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    Переход металл-диэлектрик в катион-замещенных соединениях ReхMn1-xS (Re = Gd, Sm, Ho) / О. Б. Романова [и др.] // Вестник СибГАУ. - 2015. - Т. 16, № 2. - С. 478-484. - Библиогр.: 38. - Работа выполнена при финансовой поддержке РФФИ № 15-42-04099 р_Cибирь_а и государственного задания № 114090470016. . - ISSN 1816-9724
   Перевод заглавия: Metal-insulator transition in the cation-substituted compounds RexMn1-xS (Re = Gd, Sm, Ho)
Кл.слова (ненормированные):
СУЛЬФИДЫ РЕДКОЗЕМЕЛЬНЫХ ЭЛЕМЕНТОВ -- ПРОВОДИМОСТЬ -- ПЕРЕХОД МЕТАЛЛ-ДИЭЛЕКТРИК -- ТЕРМОЭДС -- SULFIDES OF RARE-EARTH ELEMENTS -- CONDUCTIVITY -- TRANSITION METAL-INSULATOR -- THERMOELECTRIC POWER
Аннотация: Представлены результаты исследования транспортных свойств катион-замещенных сульфидов RexMn1-xS (Re = Gd, Sm, Ho) с ГЦК-решеткой типа NaCl в области температур 77-1200 К. С увеличением степени катионного замещения в этих соединениях RexMn1-xS (Re = Gd, Sm, Ho) изменяется тип проводимости от полупроводникового до металлического при критической концентрации Х С. Концентрационный переход металл-диэлектрик в системе Gd XMn 1-XS сопровождается уменьшением величины удельного электросопротивления на 12 порядков и коэффициента термоЭДС (α) на два порядка. Катионное замещение в твердых растворах GdxMn1-xS приводит к смене дырочного типа проводимости (α > 0), свойственного моносульфиду марганца, на электронный (α < 0). Уменьшение величины α с увеличением содержания гадолиния в решетке MnS указывает на то, что Gd действует как донорная примесь. Для Sm 0,2Mn 0,8S обнаружен резкий максимум сопротивления при Т = 100 К, который может быть вызван рассеянием электронов проводимости на спиновых флуктуациях локализованных электронов. Установлен металлический тип проводимости для Sm 0,25Mn 0,75S и механизм электрического сопротивления, который связан с рассеянием электронов на акустических фононах и с магнитным рассеянием на нескомпенсированных антиферромагнитных кластерах марганца при Т < 180 К. В результате замещения марганца самарием в твердом растворе SmxMn1-xS электронная структура перестраивается, и сопротивление невозможно объяснить на основе протекания ионов самария. Общей закономерностью температурных зависимостей коэффициента термоЭДС как для системы с гадолинием, так и для системы с самарием является проявление отрицательного значения термоЭДС во всем диапазоне температур с ростом Х. В системе HoxMn1-xS переход металл-диэлектрик обнаружен для ХС = 0,3 с уменьшением величины удельного электросопротивления на десять порядков. Цель данной работы - установить условия реализации перехода металл-диэлектрик в катион-замещенных системах RexMn1-xS (Re = Gd, Sm, Ho).
This paper presents the results of a study of the transport properties of cation-substituted sulfides Re XMn 1-XS (Re = = Gd, Sm, Ho) with FCC NaCl type in the temperature range 77-1200 K. With increasing degree of cation substitution in these compounds Re XMn 1- ХS (Re = Gd, Sm, Ho) the conductivity type changes from the semiconductor to the «metal» at the critical concentration X C. The concentration of metal-insulator transition in the system Gd XMn 1-XS is accompanied by a decreasing in the electrical resistivity of value on 12 orders and Seebeck coefficient (α) is on two orders. The cation-substitution in the solid solutions Gd XMn 1-XS leads to p-type conductivity (α > 0), as comprising to electronic (α < 0) for manganese monosulfide. Decrease of α with increasing gadolinium concentration in the MnS lattice indicates that the Gd acts as a donor impurity. For Sm 0,2Mn0,8S a maximum resistance at T = 100 K attributed to the scattering of conduction electrons by spin fluctuations of localized electrons. The metallic conductivity for Sm 0.25Mn 0.75S and the mechanism of electrical resistance, which is related to the scattering of electrons by acoustic phonons and magnetic scattering by uncompensated antiferromagnetic manganese clusters at T < 180 K were revealed. As a result of the substitution of manganese to samarium in solid solution Sm XMn 1-XS the electron structure is reconstructed, and the resistance cannot be explained on the basis of the percolation of samarium ions. The temperature dependence of Seebeck coefficient for systems with gadolinium and with samarium reveals the negative values of thermoelectric power in the all range of temperatures with increasing concentration (X). The metal-insulator transition for system Ho XMn 1-XS at Х С= 0,3 is observed with decreasing resistivity on ten orders. The purpose of this work is to establish conditions for the realization of the metal-insulator transition in a cation-substituted systems Re XMn 1-XS (Re = Gd, Sm, Ho).

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Держатели документа:
Институт физики им. Л. В. Киренского СО РАН
Сибирский государственный аэрокосмический университет имени акад. М. Ф. Решетнева

Доп.точки доступа:
Романова, Оксана Борисовна; Romanova, O. B.; Харьков, Анатолий Михайлович; Kharkov A. M.; Ситников, Максим Николаевич; Sitnicov M. N.; Кретинин, В. В.; Kretinin, V. V.
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Thermoelectric properties of the SmCoO3 and NdCoO3 cobalt oxides / V. A. Dudnikov, A. S. Fedorov, Y. S. Orlov [et al.] // Ceram. Int. - 2020. - Vol. 46, Is. 11. - P. 17987-17991, DOI 10.1016/j.ceramint.2020.04.113. - Cited References: 41. - This study was supported by the Russian Science Foundation, project no. 16-13-00060. . - ISSN 0272-8842. - ISSN 1873-3956

РУБ Materials Science, Ceramics
Рубрики:
MAGNETIC-PROPERTIES
   SPIN
   CONDUCTIVITY
   TRANSITIONS
   LACOO3
   SITE
Кл.слова (ненормированные):
Perovskite -- Thermoelectric oxide materials
Аннотация: The thermoelectric properties of the NdCoO3 and SmCoO3 rare-earth cobalt oxides with a perovskite structure have been investigated in a wide temperature range. It is shown that, in the low-temperature region, the thermal conductivity of the compounds has a sharp maximum and the electrical conductivity of the samples increases with temperature, whereas the Seebeck coefficient behaves nonmonotonically with increasing temperature. The SmCoO3 oxide is characterized by the positive thermopower over the entire investigated range with a sharp growth in the low-temperature region, attaining the maximum value (S ≈ 1000 μV/K) near room temperature, and a further decrease. It has been established that, in the NdCoO3 oxide, the Seebeck coefficient changes its sign, which was rarely observed in the La-based compounds and is atypical of the undoped rare-earth cobalt oxides. The thermopower maximum obtained at a temperature of 450 K is 400 μV/K. The regions of the fastest growth of the thermoelectric power factor correspond to the anomalies caused by the spin transition of Со3+ ions and the dielectric–metal transition.

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Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Krasnoyarsk Sci Ctr, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Lebedev Phys Inst, Moscow 119991, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Ioffe Inst, St Petersburg 194021, Russia.

Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Fedorov, A. S.; Федоров, Александр Семенович; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Solovyov, L. A.; Vereshchagin, S. N.; Gavrilkin, S. Yu; Tsvetkov, A. Yu; Gorev, M. V.; Горев, Михаил Васильевич; Novikov, S., V; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Science FoundationRussian Science Foundation (RSF) [16-13-00060]
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Thermoelectric properties of optically transparent thin films based on single-walled carbon nanotubes / I. A. Tambasov [et al.] // Fourth Asian school-conference on physics and technology of nanostructured materials (ASCO-NANOMAT 2018) : proceedings. - Vladivostok, 2018. - P. 88-89

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Доп.точки доступа:
Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Voronin, A. S.; Evsevskaya, N. P.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Abelyan, S. R.; Tambasova, E. V.; Asian School-Conference on Physics and Technology of Nanostructured Materials(4 ; 2018 ; Sept. ; 23-28 ; Vladivostok); Азиатская школа-конференция по физике и технологии наноструктурированных материалов(4 ; 2018 ; сент. ; 23-28 ; Владивосток); Институт автоматики и процессов управления ДВО РАН; Дальневосточный федеральный университет
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Thermoelectric properties of low-cost transparent single wall carbon nanotube thin films obtained by vacuum filtration / I. A. Tambasov [et al.] // Physica E. - 2019. - Vol. 114. - Ст. 113619, DOI 10.1016/j.physe.2019.113619. - Cited References: 53. - The study was carried out by a grant of Russian Science Foundation (project No. 17-72-10079). The electron microscopy examination was carried out at the Center for Collective Use of the Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences (Krasnoyarsk, Russia). V.A.E. and E.D.O. thank RFFI-18-32-00998_mol_a and RFFI-19-02-00859_a projects for support of development of two aqueous phase technique for nanotube separation. . - ISSN 1386-9477
Кл.слова (ненормированные):
Single-wall carbon nanotubes -- Aqueous two-phase extraction -- Semiconducting and metallic SWNTs -- Thin SWNT films -- Thermoelectric properties -- Thermoelectric figure of merit
Аннотация: The dispersions of semiconducting (sc-) and metallic (m-) SWCNTs with purity more than 98 and 86%, correspondingly, were obtained by using the aqueous two-phase extraction method. The unseparated (un-) SWCNTs contained ~3/4 of semiconducting and ~1/4 of metallic nanotubes. Thin films based on unseparated, semiconducting and metallic SWCNTs were prepared by vacuum filtration method. An Atomic Force Microscopy (AFM) and a Transmission Electronic Microscopy (TEM) were used to investigate the thin film microstructure. The thin SWCNT film transmittance was measured in the wavelength range of 300–1500 nm. Thermoelectric properties were carried out in the temperature range up to 200 °C. The largest Seebeck coefficient was observed for thin films based on semiconducting SWCNTs. The maximum value was 98 μV/K under the temperature of 170 °C. The lowest resistivity was 7.5·10−4·Ohm·cm at room temperature for thin un-SWCNT films. The power factor for m-SWCNT and un-SWCNT films was 47 and 213 μW m−1 K−2, correspondingly, at room temperature and 74 and 54 μW m−1 K−2 at 200 °C, respectively. For a thin sc-SWCNT film the maximum power factor was 2.8 μW m−1 K−2 at 160 °C. The un-SWCNT film thermal conductivity coefficient was 5.63 and 3.64 W m−1 K−1 and a thermoelectric figure of merit was 0.011 and 0.016 at temperatures of 23 and 50 °C, respectively.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk Scientific Center, Federal Research Center KSC Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk, 660036, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center KSC Siberian Branch of Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Sciences and Technologies, Krasnoyarsky Rabochy Avenue 31, Krasnoyarsk, 660037, Russian Federation
Siberian Federal University, Svobodny Avenue 79, Krasnoyarsk, 660041, Russian Federation
Prokhorov General Physics Institute of RAS, Vavilov Street 38, Moscow, 119991, Russian Federation
Moscow Institute of Physics and Technology, Institutskiy per.9, Dolgoprudny, Moscow Region, 141701, Russian Federation
Lobachevsky State University of Nizhny Novgorod, Gagarin Avenue 23/3, Nizhny Novgorod, 603950, Russian Federation

Доп.точки доступа:
Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Voronin, A. S.; Evsevskaya, N. P.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Fadeev, Y. V.; Simunin, M. M.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Smolyarova, T. Е.; Abelian, S. R.; Абелян, Сергей Рубенович; Tambasova, E. V.; Gornakov, M. O.; Горнаков, М. О.; Eremina, V. A.; Kuznetsov, Y. M.; Dorokhin, M. V.; Obraztsova, E. D.
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    Thermoelectric properties and stability of the Re0.2Sr0.8CoO3-δ (Re = Gd, Dy) complex cobalt oxides in the temperature range of 300‒800 K / V. A. Dudnikov [et al.] // Ceram. Int. - 2019. - Vol. 45, Is. 5. - P. 5553-5558, DOI 10.1016/j.ceramint.2018.12.013. - Cited References: 38. - This study was supported by the Russian Science Foundation , project no. 16-13-00060 , Russia . - ISSN 0272-8842
   Перевод заглавия: Термоэлектрические свойства и стабильность Re0.2Sr0.8CoO3-δ (Re = Gd, Dy) сложных оксидов кобальта в температурном интервале 300-800 К
Кл.слова (ненормированные):
Substituted rare earth cobalt oxides -- Thermoelectric oxide materials -- Ordered and disordered states
Аннотация: Temperature dependences of the electrical resistivity and Seebeck coefficient of the Re0.2Sr0.8CoO3‒δ (Re = Gd, Dy) complex cobalt oxides in the temperature range of 300 – 800 K have been investigated. The effects of ordering in the cation and anion sublattices on the thermoelectric properties has been examined and their comparative analysis has been made. It was found that, in the investigated temperature range, the thermoelectric power factor of the ordered compounds significantly exceeds the analogous parameter of the disordered samples. The temperature dependence of the electrical resistivity was shown to obey the activation law. As the temperature increases, the samples undergo a semiconductor-semiconductor electronic transition with a decrease in the activation energy. The thermoelectric properties of all the samples are shown to be stable in the investigated temperature range. The maximum thermoelectric power factor of the ordered Dy0.2Sr0.8CoO2.67 cobaltite at a temperature of 360 K has been obtained; it amounts to 0.23 µW/(cm·K2), which is a good parameter for this class of materials.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian Branch”, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Institute of Engineering Physics and Radio Electronics, Krasnoyarsk, 660041, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center “Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian Branch”, Krasnoyarsk, 660036, Russian Federation
Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. Petersburg, 194021, Russian Federation

Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Kazak, N. V.; Казак, Наталья Валерьевна; Fedorov, A. S.; Федоров, Александр Семенович; Solov'yov, L. A.; Vereshchagin, S. N.; Burkov, A. T.; Novikov, S. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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Thermoelectric properties and cost optimization of spark plasma sintered n-type Si0.9Ge0.1 - Mg2Si nanocomposites / A. Usenko [et al.] // Scripta Mater. - 2018. - Vol. 146. - P. 295-299, DOI 10.1016/j.scriptamat.2017.12.019. - Cited References: 28. - This work was supported by Russian Science Foundation (project No. 16-13-00060). Part of the work (structural characterization of the samples) was carried out with financial support of the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST “MISiS”. Partial support by Act 211 Government of the Russian Federation, contract # 02.A03.21.0011, is also acknowledged. . - ISSN 1359-6462
Кл.слова (ненормированные):
Cost optimization -- Lattice thermal conductivity -- Magnesium silicides -- Spark plasma -- Thermo-Electric materials -- Thermoelectric figure of merit -- Thermoelectric performance -- Thermoelectric properties
Аннотация: We report on thermoelectric properties of low Ge content n-type Si0.9Ge0.1–Mg2Si nanocomposite. Introduction of the Mg2Si phase into a SiGe matrix resulted in a dramatic drop of the lattice thermal conductivity beyond the previously reported lowest limit for SiGe alloys due to intensification of phonon scattering on SiGe–Mg2Si grain boundaries. For a sample doped with 1 at.% of Mg2Si, the peak value of thermoelectric figure of merit ZT reached ~ 0.8 at 800 °C. Sintered nanocomposites still exhibit high thermoelectric performance while being almost two times cheaper than Si0.8Ge0.2.

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Держатели документа:
National University of Science and Technology “MISiS”, Moscow, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk, Russian Federation
National Research South Ural State University, Chelyabinsk, Russian Federation

Доп.точки доступа:
Usenko, A.; Moskovskikh, D.; Korotitskiy, A.; Gorshenkov, M.; Zakharova, E.; Fedorov, A. S.; Федоров, Александр Семенович; Parkhomenko, Y.; Khovaylo, V.
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Thermoelectric and Plasmonic Properties of Metal Nanoparticles Linked by Conductive Molecular Bridges / A. S. Fedorov, P. O. Krasnov, M. A. Visotin [et al.] // Phys. Status Solidi B. - 2020. - Vol. 257, Is. 12. - Ст. 2000249, DOI 10.1002/pssb.202000249. - Cited References: 53. - This study was supported by the Russian Science Foundation, project no. 16-13-00060 (thermoelectric properties), and by the Ministry of Science and High Education of the Russian Federation, project no. FSRZ-2020-0008 (plasmonic properties) . - ISSN 0370-1972. - ISSN 1521-3951

РУБ Physics, Condensed Matter
Рубрики:
POLYMERS
ARRAYS
RANGE
Кл.слова (ненормированные):
charge transfer plasmons -- density functional theory -- nanoparticles -- thermoelectric properties
Аннотация: Thermoelectric and plasmonic properties of systems comprising small golden nanoparticles (NPs) linked by narrow conductive polymer bridges are studied using the original hybrid quantum-classical model. The bridges are considered here to be either conjugated polyacetylene, polypyrrole, or polythiophene chain molecules terminated by thiol groups. The parameters required for the model are obtained using density functional theory and density functional tight-binding simulations. Charge-transfer plasmons in the considered dumbbell structures are found to possess frequency in the infrared region for all considered molecular linkers. The appearance of plasmon vibrations and the existence of charge flow through the conductive molecule, with manifestation of quantum properties, are confirmed using frequency-dependent polarizability calculations implemented in the coupled perturbed Kohn-Sham method. To study the thermoelectric properties of the 1D periodical systems, a universal equation for the Seebeck coefficient is derived. The phonon part of the thermal conductivity for the periodical -NP-S-C8H8- system is calculated by the classical molecular dynamics. The thermoelectric figure of meritZTis calculated by considering the electrical quantum conductivity of the systems in the ballistic regime. It is shown that forAu309nanoparticles connected by polyacetylene, polypyrrole, or polythiophene chains atT = 300 K, the ZTvalue is {0.08;0.45;0.40}, respectively.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
RAS, Kirensky Inst Phys, KSC, SB, Krasnoyarsk 660036, Russia.
Tomsk State Univ, Tomsk 634050, Russia.

Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Krasnov, Pavel O.; Visotin, M. A.; Высотин, Максим Александрович; Tomilin, F. N.; Томилин, Феликс Николаевич; Polyutov, Sergey P.; Russian Science FoundationRussian Science Foundation (RSF) [16-13-00060]; Ministry of Science and High Education of the Russian Federation; FSRZ-2020-0008 (plasmonic properties)
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The Sr2.4Dy0.6Co2O7-δ Ruddlesden‒Popper Phase: Structural, thermoelectric, and magnetic properties / V. A. Dudnikov, Y. S. Orlov, L. A. Solovyov [et al.] // Ceram. Int. - 2021. - Vol. 47, Is. 7, Part A. - P. 9068-9074, DOI 10.1016/j.ceramint.2020.12.030. - Cited References: 39. - The study was supported by the Russian Foundation for Basic Research , project no. 19-03-00017 and the budget project #АААА-А17-117021310222-4 for the Institute of Chemistry and Chemical Technology, Siberian Branch of the Russian Academy of Sciences . - ISSN 0272-8842
Кл.слова (ненормированные):
Rare-earth substituted cobalt oxides -- Ruddlesden-Popper phase -- Thermoelectric oxide materials -- Magnetic properties
Аннотация: A new anion-deficient Sr2.4Dy0.6Co2O7‒δ (δ = 0.33–1.1) perovskite phase with a structure of the A3B2O7 Raddlesden‒Popper homologous series has been obtained by the solid-state synthesis in the reducing/oxidizing atmosphere and its structural characterization has been performed by the Rietveld refinement of the X-ray powder diffraction data. It has been stablished that the Sr2.4Dy0.6Co2O7‒δ compound (sp. gr. I4/mmm) has parameters of a = b = 3.8526(1) and c = 19.9431(7) Å in the reduced form (δ = 1.1) and a = b = 3.8086(1) and c = 19.9190(6) Å in the oxidized form (δ ≈ 0.33) and oxygen vacancies occupy mainly the sites linking CoO5 polyhedra inside two perovskite layers. It has been established using differential scanning calorimetry and thermogravimetry that, at T < 530 K, the synthesized phase is stable against the inert and oxidizing atmosphere; at higher temperatures, the Sr2.4Dy0.6Co2O7-δ compound can reversibly absorb/release oxygen. The magnetic properties of the Sr2.4Dy0.6Co2O6.09 compound have been investigated in the temperature range of 10–400 K and described in terms of the formation of dimers, in which the Co3+‒Co3+ and Co2+‒Co2+ ion pairs antiferromagnetically interact and are in the nonmagnetic ground state. The electrical conductivity and the Seebeck coefficient have been measured in air in the temperature range from 300 to 800 K. An observed sharp decrease in the Seebeck coefficient of the Sr2.4Dy0.6Co2O7-δ compound and the change in its sign near 700 K have been attributed to the transition of cobalt ions to the Co3+ state and the charge disproportionation of Co3+ ions to Co2+ and Co4+ ones.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991, Russian Federation

Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Solovyov, L. A.; Vereshchagin, S. N.; Gavrilkin, S. Y.
}
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The alternating-sign magnetoresistance of polycrystalline manganese chalcogenide films / S. S. Aplesnin [et al.] // Semicond. Sci. Technol. - 2018. - Vol. 33, Is. 8. - Ст. 085006, DOI 10.1088/1361-6641/aace44. - Cited References: 33. - The reported study was funded by Russian Foundation for Basic Research (RFBR) according to the research project No 18-52-00009 Bel_a; No 18-32-00079 mol_a; No 18-42-240001 r_a; the state order No 3.5743.2017/6.7. . - ISSN 0268-1242. - ISSN 1361-6641

РУБ Engineering, Electrical & Electronic + Materials Science,
Рубрики:
NEUTRON-SCATTERING
   SURFACE-STATES
   MNTE
   CONDUCTIVITY
   MECHANISM
Кл.слова (ненормированные):
polycrystalline films -- magnetoresistance -- impedance -- polaron -- magnetic -- properties -- thermoelectric
Аннотация: The correlation between the dc and ac electrical resistance and the structural, magnetic, and thermoelectric properties of polycrystalline MnSe1−X Te Х (0.3 ≤ X ≤ 0.4) manganese chalcogenide films in the temperature range of 80–400 K has been investigated. Inhomogeneous electronic states and transitions between them accompanied by structural lattice deformations have been found at temperatures including the Neel temperature region. The magnetic susceptibility maximum above the Neel temperature in a magnetic field of 8.6 kOe has been observed. Temperature ranges of the coexistence of two types of electrically inhomogeneous states have been established by impedance spectroscopy in the frequency range of 0.1–1000 kHz and the change of the hopping conductivity for diffusion one accompanied by the magnetic susceptibility minimum has been found. The magnetoresistance in magnetic fields of up to 12 kОе has been established. It has been revealed that the thermopower and magnetoresistance change its sign upon heating. The experimental data are explained using a spin polaron model with the localization of polarons and formation of the electron phase-separation. The alternation of magnetoresistance in sign is attributed to the ferromagnetic orbital ordering of electrons and the negative magnetoresistance is explained by suppression of spin fluctuations in a magnetic field.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Akademgorodok 50,Bld 38, Krasnoyarsk 660036, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarskii Rabochi Ave 31, Krasnoyarsk 660014, Russia.
Sci Pract Mat Res Ctr NAS Belarus, P Brovki Str 19, Minsk 220072, BELARUS.

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Romanova, O. B.; Романова, Оксана Борисовна; Sitnikov, M. N.; Kretinin, V. V.; Galyas, A., I; Yanushkevich, K., I; Russian Foundation for Basic Research (RFBR) [18-52-00009 Bel_a, 18-32-00079 mol_a, 18-42-240001 r_a]; [3.5743.2017/6.7]
}
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10.

Study of plasmons and thermoelectric properties of nanoparticles connected by thin conductive bridges / A. S. Fedorov, P. O. Krasnov, M. A. Visotin, H. Ågren // The Fifth Asian School-Conference on Physics and Technology of Nanostructured Materials : Proceedings. - VLadivostok : Dalnauka Publishing, 2020. - Ст. VI.30.03o. - P. 168. - This study was supported by the Russian Science Foundation, project no. 16-13-00060. . - ISBN 978-5-8044-1698-1

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Доп.точки доступа:
Fedorov, A. S.; Федоров, Александр Семенович; Krasnov, P.O.; Visotin, M. A.; Высотин, Максим Александрович; Ågren, H.; Asian School-Conference on Physics and Technology of Nanostructured Materials(5 ; 2020 ; 30 Jul - 3 Aug ; Vladivostok); Азиатская школа-конференция по физике и технологии наноструктурированных материалов(5 ; 2013 ; 30 июля - 3 авг. ; Владивосток)
}
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11.

Structural, Optical, and Thermoelectric Properties of the ZnO:Al Films Synthesized by Atomic Layer Deposition / I. A. Tambasov [et al.] // Phys. Solid State. - 2019. - Vol. 61, Is. 10. - P. 1904-1909, DOI 10.1134/S1063783419100354. - Cited References: 33. - This study was supported by the Russian Science Foundation, project no. 17-72-10079. . - ISSN 1063-7834
Кл.слова (ненормированные):
atomic layer deposition -- thin films -- aluminum-doped zinc oxide -- structural and optical properties -- thermoelectric properties
Аннотация: Aluminum-doped zinc oxide thin films have been grown by atomic layer deposition at a temperature of 200°C. Using X-ray diffraction, it has been established that the ZnO:Al thin films exhibits the reflections from the (100), (002), (110), and (201) ZnO hexagonal phase planes. The (101) and (102) planes have also been detected by electron diffraction. The ZnO:Al thin films grow smooth with a root-mean-square roughness of Rq = 0.33 nm and characteristic nanocrystallite sizes of ~70 and ~15 nm without additional aluminum or aluminum oxide phases. The transmission at a wavelength of 550 nm with regard to the substrate has been found to be 96%. The refractive indices and absorption coefficients of the ZnO:Al thin films in the wavelength range of 250–900 nm have been determined. The maximum refractive indices and absorption coefficients have been found to be 2.09 at a wavelength of 335 nm and 0.39 at a wavelength of 295 nm, respectively. The optical band gap is 3.56 eV. The resistivity, Seebeck coefficient, and power factor of the ZnO:Al thin films are ∼1.02 × 10–3 Ω cm, –60 μV/K, and 340 μW m–1 K–2 at room temperature, respectively. The maximum power factor attains 620 μW m–1 K–2 at a temperature of 200°C.

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Публикация на русском языке

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch,Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian State University of Science and Technology, Krasnoyarsk, 660014, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Voronin, A. S.; Evsevskaya, N. P.; Евсевская, Н. П.; Masyugin, A. N.; Масюгин, Альберт Николаевич; Aleksandrovskii, A. S.; Александровский, Александр Сергеевич; Smolyarova, T. E.; Nemtsev, I. V.; Немцев, Иван Васильевич; Lyashchenko, S. A.; Лященко, Сергей Александрович; Bondarenko, G. N.; Tambasova, E. V.
}
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12.

Structural and Thermoelectric Properties of Optically Transparent Thin Films Based on Single-Walled Carbon Nanotubes / I. A. Tambasov [et al.] // Phys. Solid State. - 2018. - Vol. 60, Is. 12. - P. 2649-2655, DOI 10.1134/S1063783418120296. - Cited References: 31. - This work was supported by the Russian Science Foundation (project no. 17-72-10079). . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter

Аннотация: Thin films have been produced via a spray method from commercially available single-walled carbon nanotubes (SWCNTs). A SWCNT film thickness has ranged from ~10 to ~80 nm. The SWCNT diameter has accepted values of 1.6–1.8 nm. The existence of SWCNTs longer than 10 μm is established. The optimal thickness of a SWCNT thin film is found to be ~15 nm at which the transmittance exceeds 85%. The specific resistance of SWCNT thin films goes from ~1.5 × 10–3 to ~3 × 10–3 Ohm cm at room temperature. The pioneering study of the temperature dependences of the Seebeck coefficient and surface resistance is performed for this type of SWCNT. A surface resistance is found to increase with rising temperature. Furthermore, the Seebeck coefficient of SWCNT thin films weakly depends on temperature. Its value for all samples is evaluated to be ~40 μV/K. According to the sign of the Seebeck coefficient, thin films exhibit hole-type conductivity. Moreover, the power factor of a 15-nm thin SWCNT-film decreases with a temperature increase to 140◦C from the value of approximately ~120 to ~60 μW m–1 K–2. A further rise in temperature has led to a gain in the power factor.

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Публикация на русском языке Структурные и термоэлектрические свойства оптически прозрачных тонких пленок на основе одностенных углеродных нанотрубок [Текст] / Тамбасов И.А. [и др.] // Физ. тверд. тела. - 2018. - Т. 60 Вып. 12. - С. 2456-2462

Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Phys, Kransoyarsk, Russia.
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Kransoyarsk, Russia.
Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Kransoyarsk, Russia.
Siberian State Univ Sci & Technol, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Tambasov, I. A.; Тамбасов, Игорь Анатольевич; Voronin, A. S.; Evsevskaya, N. P.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Fadeev, Yu. V.; Krylov, A. S.; Крылов, Александр Сергеевич; Aleksandrovskii, A. S.; Александровский, Александр Сергеевич; Luk'yanenko, A. V.; Лукьяненко, Анна Витальевна; Abelyan, S. R.; Абелян, Сергей Рубенович; Tambasova, E. V.; Russian Science Foundation [17-72-10079]
}
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13.

Stability and thermoelectric properties of mechano-activated solid solutions of Sr1-xLnxTiO3-δ (Ln = Nd, Gd, Dy) / Y. S. Orlov, S. N. Vereshchagin, L. A. Solovyov [et al.] // J. Taiwan Inst. Chem. Eng. - 2022. - Vol. 138. - Ст. 104449, DOI 10.1016/j.jtice.2022.104449. - Cited References: 39. - This study was supported by the Russian Foundation for Basic Research, project no. 20-52-04008 Bel_mol_a. Thermal analysis was performed within the scope of Budget Project No. 0287-2021-00-13 for the Institute of Chemistry and Chemical Technology SB RAS . - ISSN 1876-1070
Кл.слова (ненормированные):
Strontium titanate solid solutions -- Thermoelectric oxide materials -- Mechanochemical activation -- Electron microscopy
Аннотация: Background: The effect of mechanochemical activation on the microstructure, morphology, and thermoelectric parameters of the materials leading to an increase in the power factor (PF) is demonstrated by the example of the Sr1-xLnxTiO3-δ (Ln = Nd, Gd, Dy; x = 0.05, 0.075, 0.1) solid solutions. Methods: The strontium titanate solid solutions have been synthesized using a conventional ceramic technology from particles of different sizes obtained by mechanical activation of annealed ceramics. Findings: It is shown that different sizes of initial particles cause the morphological and microstructural differences and significantly affect the stability and thermoelectric properties of the synthesized samples. It has been established that a decrease in the initial particle size ensures the thermal stability of the samples and leads to an increase in their electrical conductivity and PF at the minor variation in the Seebeck coefficient. The PF of the Sr0.925Nd0.075TiO3 solid solution changes by a factor of 7. It has been found that the mechanically activated samples have the much lower porosity than the nonactivated ones, which noticeably reduces the effective area of their interaction with the environment (oxygen release and absorption); therefore, all the measurement data obtained on the mechanically activated samples upon their heating and cooling are reversible.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russian Federation
Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, bld. 24, Krasnoyarsk, 660036, Russian Federation
SSPA "Scientific-Practical Materials Research Centre of NAS of Belarus", 19 P. Brovki st.Minsk 220072, Belarus

Доп.точки доступа:
Orlov, Yu. S.; Орлов, Юрий Сергеевич; Vereshchagin, S. N.; Solovyov, L. A.; Borus, A. A.; Борус, Андрей Андреевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Nikitin, A. V.; Bushinsky, M. V.; Lanovsky, R. A.; Rymski, G. S.; Dudnikov, V. A.; Дудников, Вячеслав Анатольевич
}
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14.

Sign-variable thermoelectric effect in magnetoviscous Fe86Mn13C alloy [Text] / L. I. Kveglis, V. V. Kazantseva [et al.] // IV Euro-Asian Symposium "Trends in MAGnetism" Nanospintronics (EASTMAG-2010). School for young scientist "Spintronics" : June 28 - Lule 2, 2010"Book of abstracts. - Ekaterinburg, 2010. - P. 119

РИНЦ

Доп.точки доступа:
Kveglis, L.I.; Kazantseva, V.V.; Musikhin, V.A.; Panichkin, Yu.V.; Euro-Asian Symposium "Trends in MAGnetism"(4 ; 2010 ; Jun.-Jul. ; Ekaterinburg); "Trends in MAGnetism", Euro-Asian Symposium(4 ; 2010 ; Jun.-Jul. ; Ekaterinburg); Уральское отделение РАН
}
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15.

Regularity of thermal characteristics, thermoelectric properties of EuLnCuSe3 compounds (Ln = La–Lu) / N. N. Habibullayev, A. T. Burkov, S. V. Novikov [et al.] // Eur. Phys. J. Plus. - 2024. - Vol. 139, Is. 5. - Ст. 412, DOI 10.1140/epjp/s13360-024-05155-6. - Cited References: 53. - This study was funded by the Russian Science Foundation (project No. 23-23-00488 "Search for EMF generation conditions in gradient ceramics of samarium monosulfide (SmS)"). A.S.A is grateful for the state assignment funding from Kirensky Institute of Physics . - ISSN 2190-5444
Аннотация: The temperatures and enthalpies of the decomposition of EuLnCuSe3 compounds (Ln = La–Lu) are determined for the first time as functions of the Ln3+ ionic radius (rLn3+). The EuLnCuSe3 compounds with Ln = La and Ce decompose in the course of a solid-phase reaction to form EuSe, Ln2Se3, and Cu2−xSe, whereas those with Ln = Tb, Dy, Ho, Tm, and Lu melt incongruently to form EuSe and a melt, for example, Tdecay = 1175 K and ΔHdecay = 2.66 kJ/mol for EuLaCuSe3, while Tmelt = 1576 K and ΔHmelt = 2.69 kJ/mol for EuTbCuSe3. When plotted as functions of rLn3+, the temperatures of thermal effects of these compounds exhibit a periodic dependence and a tetrad effect. The temperature dependence of electrical resistivity and that of the Seebeck coefficient are measured from 300 to 600 K. It is shown that the studied compounds are p-type semiconductors with bandgaps ranging from 0.4 to ~ 1 eV.

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Держатели документа:
Department of Inorganic and Physical Chemistry, University of Tyumen, Tyumen, 625003, Russia
Thermoelement Physics Laboratory, Department of Physics of Dielectrics and Semiconductors, Ioffe Institute, St. Petersburg, 194021, Russia
Department of Physical and Applied Chemistry, Kurgan State University, Sovetskaya Str. 63/4, Kurgan, 640020, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok Str. 50, Building 38, Krasnoyarsk, 660036, Russia
Siberian Federal University, Svobodnyj Av. 79, Krasnoyarsk, 660079, Russia
School of Natural Sciences, University of Tyumen, Tyumen, 625003, Russia
Laboratory of the Chemistry of Rare Earth Compounds, Institute of Solid State Chemistry, UB RAS, Ekaterinburg, 620990, Russia
Department of Construction Materials, Industrial University of Tyumen, Tyumen, 625000, Russia

Доп.точки доступа:
Habibullayev, N. N.; Burkov, A. T.; Novikov, S. V.; Yurev, I. O.; Aleksandrovskiy, A. S.; Александровский, Александр Сергеевич; Zakharova, A. D.; Shulaev, N. A.; Denisenko, Yu. G.; Andreev, O. V.
}
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16.

    Quaternary selenides EuLnCuSe3: Synthesis, structures, properties and in silico studies / M. V. Grigoriev, L. A. Solovyov, A. V. Ruseikina [et al.] // Int. J. Mol. Sci. - 2022. - Vol. 23, Is. 3. - Ст. 1503, DOI 10.3390/ijms23031503. - Cited References: 90 . - ISSN 1422-0067
   Перевод заглавия: Четвертичные селениды EuLnCuSe3: синтез, структура, свойства и компьютерное моделирование

РУБ Biochemistry & Molecular Biology + Chemistry, Multidisciplinary
Рубрики:
RARE-EARTH
   CRYSTAL-STRUCTURES
   MAGNETIC-PROPERTIES
   THERMOELECTRIC PERFORMANCE
Кл.слова (ненормированные):
inorganic materials -- ab initio calculations -- magnetic measurements -- lattice dynamics -- vibrational spectroscopy -- optical spectroscopy -- negative magnetization
Аннотация: In this work, we report on the synthesis, in-depth crystal structure studies as well as optical and magnetic properties of newly synthesized heterometallic quaternary selenides of the Eu+2Ln+3Cu+1Se3 composition. Crystal structures of the obtained compounds were refined by the derivative difference minimization (DDM) method from the powder X-ray diffraction data. The structures are found to belong to orthorhombic space groups Pnma (structure type Ba2MnS3 for EuLaCuSe3 and structure type Eu2CuS3 for EuLnCuSe3, where Ln = Sm, Gd, Tb, Dy, Ho and Y) and Cmcm (structure type KZrCuS3 for EuLnCuSe3, where Ln = Tm, Yb and Lu). Space groups Pnma and Cmcm were delimited based on the tolerance factor t’, and vibrational spectroscopy additionally confirmed the formation of three structural types. With a decrease in the ionic radius of Ln3+ in the reported structures, the distortion of the (LnCuSe3) layers decreases, and a gradual formation of the more symmetric structure occurs in the sequence Ba2MnS3 → Eu2CuS3 → KZrCuS3. According to magnetic studies, compounds EuLnCuSe3 (Ln = Tb, Dy, Ho and Tm) each exhibit ferrimagnetic properties with transition temperatures ranging from 4.7 to 6.3 K. A negative magnetization effect is observed for compound EuHoCuSe3 at temperatures below 4.8 K. The magnetic properties of the discussed selenides and isostructural sulfides were compared. The direct optical band gaps for EuLnCuSe3, subtracted from the corresponding diffuse reflectance spectra, were found to be 1.87–2.09 eV. Deviation between experimental and calculated band gaps is ascribed to lower d states of Eu2+ in the crystal field of EuLnCuSe3, while anomalous narrowing of the band gap of EuYbCuSe3 is explained by the low-lying charge-transfer state. Ab initio calculations of the crystal structures, elastic properties and phonon spectra of the reported compounds were performed.

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Держатели документа:
Univ Tyumen, Lab Theory & Optimizat Chem & Technol Processes, Tyumen 625003, Russia.
SB RAS, Inst Chem & Chem Technol, Fed Res Ctr KSC, Krasnoyarsk 660036, Russia.
Univ Tyumen, Inst Chem, Tyumen 625003, Russia.
Siberian Fed Univ, Dept Photon & Laser Technol, Krasnoyarsk 660079, Russia.
RAS, SB, Fed Res Ctr KSC, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Ural Fed Univ, Inst Nat Sci & Math, Mira Str 19, Ekaterinburg 620002, Russia.
Univ Tyumen, Inst Phys & Technol, Tyumen 625003, Russia.
Kemerovo State Univ, Res & Dev Dept, Kemerovo 650000, Russia.
Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660079, Russia.
Siberian Fed Univ, Sch Engn & Construct, Krasnoyarsk 660041, Russia.
Univ Tyumen, Engn Ctr Composite Mat Based Wolfram Cpds & Rare, Tyumen 625003, Russia.
Univ Stuttgart, Inst Inorgan Chem, D-70569 Stuttgart, Germany.
Kurgan State Univ, Adv Mat Ind & Biomed Lab, Sovetskaya Str 63-4, Kurgan 640020, Russia.
Ural Fed Univ, Innovat Ctr Chem & Pharmaceut Technol, Mira Str 19, Ekaterinburg 620002, Russia.

Доп.точки доступа:
Grigoriev, Maxim V.; Solovyov, Leonid A.; Ruseikina, Anna V.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Chernyshev, Vladimir A.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Garmonov, Alexander A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Shestakov, N. P.; Шестаков, Николай Петрович; Matigorov, Alexey V.; Volkova, Svetlana S.; Ostapchuk, Evgeniy A.; Kertman, Alexander V.; Schleid, Thomas; Safin, Damir A.
}
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17.

Order–disorder transition in the Dy0.2Sr0.8CoO3-δ rare-earth cobalt oxide solid solutions: Structural and thermoelectric properties / Y. S. Orlov, V. A. Dudnikov, S. N. Vereshchagin [et al.] // J. Eur. Ceram. Soc. - 2020. - Vol. 40, Is. 15. - P. 5559-5565, DOI 10.1016/j.jeurceramsoc.2020.06.066. - Cited References: 29. - This study was supported by the Russian Science Foundation, project no. 19-72-00097 . - ISSN 0955-2219
Кл.слова (ненормированные):
Substituted rare-earth cobalt oxides -- Thermoelectric oxide materials -- Ordered and disordered states -- Phase transition
Аннотация: By the example of the Dy0.2Sr0.8CoO3-δ compound undergoing an order–disorder phase transition with increasing temperature, we demonstrate a significant dependence of the kinetic properties on the morphology of the internal spatially inhomogeneous structure, which forms in the sample depending on the rate of its transition from the high-temperature disordered cubic phase to the ground tetragonal ordered phase upon cooling. The results of transmission electron microscopy visualization of the spatially inhomogeneous state in the Dy0.2Sr0.8CoO3-δ ceramic samples are presented and compared with the X-ray diffraction data.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Lebedev Physical Institute, Moscow, 119991, Russian Federation

Доп.точки доступа:
Orlov, Yu. S.; Орлов, Юрий Сергеевич; Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Vereshchagin, S. N.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Gavrilkin, S. Y.; Tsvetkov, A. Y.
}
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18.

Magnetic, dielectric and thermoelectric properties of Bi2Sn1.9Cr0.1O7 / L. V. Udod [et al.] // Moscow International Symposium on Magnetism (MISM-2017) : 1-7 July 2017 : book of abstracts. - 2017. - Ст. 4PO-I1-27. - P. 882

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Доп.точки доступа:
Udod, L. V.; Удод, Любовь Викторовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Sitnikov, M. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Yanushkevich, K. I.; Moscow International Symposium on Magnetism(7 ; 2017 ; Jul. ; Moscow); Московский государственный университет им. М.В. Ломоносова; Российский фонд фундаментальных исследований
Нет сведений об экземплярах (Источник в БД не найден)
}
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19.

Magnetic properties and the metal-insulator transition in GdXMn1-XS solid solutions / O. B. Romanova [et al.] // Solid State Commun. - 2010. - Vol. 150, Is. 13-14. - P. 602-604, DOI 10.1016/j.ssc.2009.12.042. - Cited References: 13. - This study was supported by the Russian Foundation for Basic Research project No. 09-02-00554_a; No. 09-02-92001-NNS_a; No. 08-02-90031 Bel_a and Belarus Foundation for Basic Research project No. F04-182; ADTF "Development of scientific potential of the higher school" No. 2.1.1/401. . - ISSN 0038-1098

РУБ Physics, Condensed Matter

Кл.слова (ненормированные):
Insulator -- Metals -- Crystal growth -- Phase transitions -- Insulator -- Metals -- Crystal growth -- Phase transitions -- Insulator -- Metals -- Antiferromagnetic semiconductors -- Crystal growth -- Cubic lattice -- Metal-insulator phase transition -- Orders of magnitude -- P-type -- Temperature range -- Thermoelectric properties -- Thermopowers -- Antiferromagnetic materials -- Antiferromagnetism -- Crystal growth -- Crystallization -- Electric properties -- Gadolinium -- Grain boundaries -- Magnetic fields -- Magnetic properties -- Manganese -- Manganese compounds -- Metal insulator boundaries -- Metals -- Semiconductor growth -- Semiconductor insulator boundaries -- Sodium chloride -- Solid solutions -- Solidification -- Metal insulator transition
Аннотация: The structural, magnetic, electrical, and thermoelectric properties of GdXMn1-XS (0.01 <= X <= 0.3) solid solutions synthesized for the first time on the basis of alpha-MnS have been studied experimentally in the temperature range 77-1000 K in magnetic fields up to 10 kOe. The synthesized samples are antiferromagnetic semiconductors with an NaCl-type cubic lattice typical of a-MnS. Both concentration (X-c = 0.3) and temperature (T-c = 450 K) metal-insulator phase transitions have been observed. The concentration metal-insulator transition is accompanied by a decrease in resistivity and thermopower by twelve and two orders of magnitude, respectively, with the change in conductivity from p-type to n-type. (C) 2010 Elsevier Ltd. All rights reserved.

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Держатели документа:
[Romanova, O. B.
Ryabinkina, L. I.
Velikanov, D. A.
Balaev, D. A.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Sokolov, V. V.
Pichugin, A. Yu.] Russian Acad Sci, Inst Inorgan Chem, Siberian Branch, Novosibirsk 630090, Russia
[Galyas, A. I.
Demidenko, O. F.
Makovetskii, G. I.
Yanushkevich, K. I.] Natl Acad Sci Belarus, GO NPTs Mat Sci Ctr, Minsk 220072, Byelarus
ИФ СО РАН
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, 660036 Krasnoyarsk, Russian Federation
Institute of Inorganic Chemistry, Russian Academy of Sciences, Siberian Branch, 630090 Novosibirsk, Russian Federation
GO NPTs Materials Science Center, National Academy of Sciences of Belarus, 220072 Minsk, Belarus

Доп.точки доступа:
Romanova, O. B.; Романова, Оксана Борисовна; Ryabinkina, L. I.; Рябинкина, Людмила Ивановна; Sokolov, V. V.; Pichugin, A. Y.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Balaev, D. A.; Балаев, Дмитрий Александрович; Galyas, A. I.; Demidenko, O. F.; Makovetskii, G. I.; Yanushkevich, K. I.
}
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20.

Magnetic and thermoelectric properties of the solid solutions Mn1-XNiXS / O. Romanova [et al.] // The 19th International Conference on Magnetism with Strongly Correlated Electron Systems : book of abstracts. - 2012. - P. 209
Аннотация:

Материалы конференции

Доп.точки доступа:
Romanova, O.; Романова, Оксана Борисовна; Ryabinkina, L. I.; Рябинкина, Людмила Ивановна; Demidenko, O. F.; Makovetskii, G.; Yanushkevich, K. I.; Korean Physical Society; Korean Magnetics Society; International Union of Pure and Applied Physics; International conference on magnetism (19 ; 2012 ; Jul ; 8-13 ; Busan, Korea / Bexco, Korea)
}
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