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Effect of the diamagnetic dilution on the magnetic ordering and electrical conductivity in the Co3O2BO3 : Ga ludwigite / N. B. Ivanova [et al.] // Phys. Solid State. - 2012. - Vol. 54, Is. 11. - P. 2212–2221, DOI 10.1134/S1063783412110133. - Cited References: 30. - This study was supported by the Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools of the Russian Federation (grant no. NSh-1044.2012.2) and the Russian Foundation for Basic Research (project nos. 12-02-00175-a and 12-02-00470-a). . - ISSN 1063-7834

РУБ Physics, Condensed Matter

Аннотация: Single crystals of cobalt ludwigite Co3O2BO3 with diamagnetic substitution of Ga3+ ions for a part of the cobalt ions have been grown by the flux method. A detailed investigation of the crystal structure and magnetic properties of the compound has been carried out. A preferred character of the occupation of non-equivalent crystallographic positions by gallium has been revealed. It has been found that the effective magnetic moment and the magnetic ordering temperature are decreased compared to those in the original crystal of the Co3O2BO3 ludwigite. It has been noted that the pronounced magnetic anisotropy observed in the crystal lographic ab plane of the original material of the Co3O2BO3 composition disappears in the presence of gallium.

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Публикация на русском языке Влияние диамагнитного разбавления на магнитное упорядочение и электрическую проводимость в людвигите Co3O2BO3:Ga [Текст] / Н. Б. Иванова [и др.] // Физ. тверд. тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54 Вып. 11. - С. 2080-2088

Доп.точки доступа:
Ivanova, N. B.; Иванова, Наталья Борисовна; Platunov, M. S.; Платунов, Михаил Сергеевич; Knyazev, Yu.V.; Князев, Юрий Владимирович; Kazak, N. V.; Казак, Наталья Валерьевна; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Nizhankovskii, V. I.
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Magnetic and electrical properties of bismuth cobaltite Bi24(CoBi)O40 with charge ordering / S. S. Aplesnin [и др.] // Phys. Solid State. - 2012. - Vol. 54, Is. 10. - P. 2005-2014, DOI 10.1134/S106378341210006X. - Cited References: 22. - This study was supported by the Russian Foundation for Basic Research (project nos. 09-02-92001-NNS_a, 12-02-00125-a, and 11-02-98004-r_sibir'_a) . - ISSN 1063-7834

РУБ Physics + Condensed Matter
Рубрики:
Thermoelectric-power
   Co3O4
   Conductivity
   Transition
Аннотация: The compound Bi24(CoBi)O40 has been synthesized using the solid-phase reaction method. The temperature and field dependences of the magnetic moment in the temperature range 4 K T 300 K and the temperature dependences of the EPR line width and g-factor at temperatures 80 K T 300 K have been investigated. The electrical resistivity and thermoelectric power have been measured in the temperature range 100 K T 1000 K. The activation energy has been determined and the crossover of the thermoelectric power from the phonon mechanism to the electron mechanism with variations in the temperature has been observed. The thermal expansion coefficient of the samples has been measured in the temperature range 300 K T 1000 K and the qualitative agreement with the temperature behavior of the electrical resistivity has been achieved. The electrical and structural properties of the compound have been explained in the framework of the model of the electronic-structure transition with inclusion of the exchange and Coulomb interactions between electrons and the electron-phonon interaction.

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Публикация на русском языке Магнитные и электрические свойства кобальтита висмута Bi24(CoBi)O40 с зарядовым упорядочением [Текст] / С. С. Аплеснин [и др.] // Физ. тверд. тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54 Вып. 10. - С. 1882-1890

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Udod, L. V.; Удод, Любовь Викторовна; Sitnikov, M. N.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Gorev, M. V.; Горев, Михаил Васильевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Galyas, A. I.; Yanushkevich, K. I.
}
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Nonuniform magnetic states and electrical properties of SmXMn1-XS solid solutions / S. S. Aplesnin [et al.] // IEEE Trans. Magn. - 2011. - Vol. 47, Is. 10. - P. 4413-4416, DOI 10.1109/TMAG.2011.2160715. - Cited References: 13 . - ISSN 0018-9464

РУБ Engineering, Electrical & Electronic + Physics, Applied

Кл.слова (ненормированные):
Conductivity -- magnetic semiconductors -- magnetization processes
Аннотация: The real and imaginary parts of magnetic permeability at the three frequencies 100 Hz, 1 kHz and 10 kHz and magnetic moment in magnetic field H = 0.05 T in the SmXMn1-XS(0.1 <= X <= 0.25) solid solutions at the temperatures 5 K-300 K were measured. Magnetization curves were measured in the range of fields -9 T < H < 9 T at the temperatures T = 5 K, 50 K. Non-linear behavior of the magnetization versus field, residual magnetic moment, logarithmic dependence of imaginary parts of the magnetic permeability maximum on frequency and sharp drop of Im(mu) at T < 40 K for compound Sm0.25Mn0.75 S were found. The electrical resistivity of the SmXMn1-X S(0.5 < x < 0.25) solid solution in the range of temperatures 80 K-300 K were measured. Minimum and maximum in the temperature dependence of the resistivity were found respectively at T = 220 K for X = 0.15 and at T = 100 K for X = 0.2 compounds. This behavior is explained a result of the mobility edge movement and the disorder of the deformation and spin density fluctuations with short-range order.

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Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Har'kov, A. M.; Eremin, E. V.; Еремин, Евгений Владимирович; Romanova, O. B.; Романова, Оксана Борисовна; Balaev, D. A.; Балаев, Дмитрий Александрович; Sokolov, V. V.; Соколов В. В.; Pichugin, A. Yu.; IEEE International Magnetics Conference(2011 ; Apr. ; 25-29 ; Taipei, Taiwan)
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Fractal dimension of cluster boundaries in porous polycrystalline HTSC materials / A. A. Bykov [et al.] // Phys. Solid State. - 2012. - Vol. 54, Is. 10. - P. 1947-1950, DOI 10.1134/S1063783412100095. - Cited References: 20 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
CURRENT-VOLTAGE CHARACTERISTICS
   ELECTRICAL-CONDUCTIVITY
   PERCOLATION
   MIXTURES
   MEDIA
   SUPERCONDUCTORS
   TRANSPORT
   SPHERES
Аннотация: The fractal dimension of the boundaries of clusters formed by pores and granules in polycrystalline materials is shown to be determined by the sample density and crystallite sizes. The dependence of the fractal dimension on the density has a maximum. It is shown that the maximum diamagnetic response can be obtained in a porous high-temperature superconductor with a porosity of 50-60% and small crystallite sizes.

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Публикация на русском языке Фрактальная размерность границ кластеров в пористых поликристаллических ВТСП-материалах [Текст] / А. А. Быков [и др.] // Физ. тверд. тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54 Вып. 10. - С. 1825-1828

Держатели документа:
[Bykov, A. A.
Terent'ev, K. Yu.
Gokhfeld, D. M.
Petrov, M. I.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Bykov, A. A.; Быков, Алексей Анатольевич; Terent'yev, K. Yu.; Терентьев, Константин Юрьевич; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Petrov, M. I.; Петров, Михаил Иванович
}
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Karpov, S. V.
Simulation of conditions for fabrication of optical nanowaveguides in the form of chains of spherical metal nanoparticles by electrostatic functionalization of the process substrate / S. V. Karpov, I. L. Rasskazov // Colloid J. - 2013. - Vol. 75, Is. 3. - P. 279-288, DOI 10.1134/S1061933X13030083 . - ISSN 1061-933X
Кл.слова (ненормированные):
Deposition of metals -- Electrical parameter -- Experimental conditions -- Nonuniform electric field -- Ordered structures -- Selective deposition -- Single-domain structure -- Transmission property -- Deposition -- Electric fields -- Mathematical models -- Metal nanoparticles -- Photoexcitation -- Plasmons -- Sols -- Substrates
Аннотация: A method is proposed for electrostatic functionalization of substrates used to prepare ordered structures composed of closely spaced plasmon-resonant nanoparticles. The method ensures selective deposition of nanoparticles from the bulk of a colloidal system onto the substrates. This method is based on placing a metal nanotemplate of a required configuration at the opposite side of a substrate, with an electric potential being applied to the template. A mathematical model is developed to ensure that the system parameters responsible for the deposition of metal nanoparticles into ordered single-domain structures on the substrate from a bulk sol in a nonuniform electric field generated by the nanotemplate correspond to the real experimental conditions. Since the degree of imperfection of the synthesized chains governs the applicability of these structures to transmission of the optical excitation at the frequency of the surface plasmon of the particles, the dependence of the degree of imperfection on the physicochemical and electrical parameters of the system is studied using the Brownian-dynamics model. The calculations of the spectral and transmission properties of nanowaveguides of this type are exemplified. В© 2013 Pleiades Publishing, Ltd.

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Публикация на русском языке Моделирование условий синтеза оптических нановолноводов из цепочек сферических металлических наночастиц методом электростатической функционализации технологической подложки. - [S. l. : s. n.]

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660028, Russia;

Доп.точки доступа:
Рассказов, Илья Леонидович; Rasskazov, I. L.; Карпов, Сергей Васильевич
}
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Contribution of Co3+ ions to the high-temperature magnetic and electrical properties of GdCoO3 / V. A. Dudnikov [et al.] // J. Exp. Theor. Phys. - 2012. - Vol. 114, Is. 5. - P. 841-849, DOI 10.1134/S106377611203003X. - Cited References: 28. - This work was supported by the Ural Branch of the Russian Academy of Sciences and Siberian Branch of the Russian Academy of Sciences (project no. 40), the Russian Foundation for Basic Research (project nos. 09-02-00171-a, 10-02-00251), program 2.3 of the Department of Physical Sciences of Russian Academy of Sciences, and Nonprofit Dinastiya Foundation. . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
SPIN-STATE
   RCOO3 R
   TRANSITIONS
   COBALTITES
   LACOO3
   OXIDES
   SM
   EU
   ND
Аннотация: The temperature dependence of the static magnetization of polycrystalline rare-earth cobaltite GdCoO3 is measured in the temperature range 2-800 K. The magnetic behaviors of GdCoO3 and Gd3+ are found to be different at temperatures above room temperature, which is caused by the appearance of a contribution from Co3+ ions at high temperatures. The temperature dependence of the magnetic susceptibility of GdCoO3 is determined by the magnetization of rare-earth gadolinium ions and the additional paramagnetic contribution induced by the thermally excited magnetic terms of Co3+ ions. The LDA + GTB method is used to calculate the electronic structure of GdCoO3 in the temperature range 0-300 K with allowance for strong electron correlations. The energy spectrum of GdCoO3 is found to have intragap states that decrease the dielectric gap width with increasing temperature.

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Публикация на русском языке Вклад ионов Co3+ в высокотемпературные магнитные и электрические свойства GdCoO3 [Текст] / В. А. Дудников [и др.] // Ж. эксперим. и теор. физ. : Наука, 2012. - Т. 141 Вып. 5. - С. 966-975

Держатели документа:
[Dudnikov, V. A.
Ovchinnikov, S. G.
Orlov, Yu S.
Kazak, N. V.
Patrin, G. S.
Yurkin, G. Yu] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Dudnikov, V. A.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
[Ovchinnikov, S. G.
Patrin, G. S.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Michel, C. R.] Univ Guadalajara, Guadalajara 44430, Jalisco, Mexico

Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Orlov, Yu.S.; Орлов, Юрий Сергеевич; Kazak, N. V.; Казак, Наталья Валерьевна; Michel, C. R.; Patrin, G. S.; Патрин, Геннадий Семёнович; Yurkin, G.Yu.; Юркин, Глеб Юрьевич
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    Physical, electrical, transport and magnetic properties of Nd(Ba,Nd)2.1Cu3O7−δ system / E. Altin [et al.] // J. Mater. Sci.: Mater. Electron. - 2013. - Vol. 24. - P. 5075-5084DOI 10.1007/s10854-013-1526-2
   Перевод заглавия: Физические, электрические и транспортные свойства системы Nd(Ba,Nd)2.1Cu3O7−δ
Аннотация: In this study, the superconducting Nd(Ba,Nd)2.1Cu3O7−δ system has been prepared using conventional solid-state reaction technique. Transport properties including structural/microstructural evolution, electrical, magnetic and critical current density properties were investigated. After high temperature heat treatments at over 1,000 °C, large and strongly connected grains were obtained but weakly connected and small in size granular formation were obtained for the low temperature heat treated samples at around 900 °C. The best T c and T 0 values were obtained as 93 and 89 K respectively for the sample prepared at 1,020 °C for 24 h, which is very close to peritectic temperature of YBCO material. Magnetization of the sample heat treated at 1,020 °C was investigated in detail. The magnetization hysteresis loops are expounded to be the product of Nd-123 grains and unscreened Nd3+ ions within intergranular boundaries and vortex cores. The peak effect on the magnetization curves was described by the extended critical state model. Temperature dependencies of the irreversibility field, the peak field and the full penetration field correlate and there is scaling behavior of the pinning force as well. Thermoelectric power data was analyzed by “Modified two band model with linear T-term for superconductors”. Temperature dependence of thermal conductivity of the samples showed small peak with broad maximum just below the T c value. Thermal conductivity of samples prepared was calculated by using “The Modified Callaway Model and Wiedermann–Franz law” and results obtained discussed.

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Держатели документа:
Inonu Univ, Bilimsel & Teknol Arastirma Merkezi, TR-44280 Malatya, Turkey
LV Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
Inonu Univ, Sagl Hizmetleri Meslek Yuksek Okulu, TR-44280 Malatya, Turkey

Доп.точки доступа:
Altin, E.; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Kurt, F.; Yakinci, Z. D.
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Electrical resistance of Sm 0.25Mn0.75S spin glass / S. S. Aplesnin [et al.] // Solid State Phenomena : Selected, peer reviewed papers. - 2012. - Vol. 190: Magnetism and Magnetic Materials V : Selected, Peer Reviewed Papers. - P. 105-108, DOI 10.4028/www.scientific.net/SSP.190.105. - Cited References: 3 . - ISSN 1662-9779. - ISSN 978-30378

РУБ Materials Science, Multidisciplinary + Physics, Multidisciplinary

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Доп.точки доступа:
Perov, N. \ed.\; Rodionova, V. \ed.\; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Kharkov, A. M.; Харьков, Анатолий Михайлович; Eremin, E. V.; Еремин, Евгений Владимирович; Sokolov, V. V.; Соколов В. В.; Moscow International Symposium on Magnetism(5 ; 2011 ; Aug. ; 21-25 ; Moscow)
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Electrical and magnetic properties of nanodiamond and pyrocarbon composites / N. I. Kiselev [et al.] // Russ. J. Gen. Chem. - 2013. - Vol. 83, Is. 11. - P. 2173-2181, DOI 10.1134/S1070363213110376 . - ISSN 1070-3632
Аннотация: The electrical and magnetic properties of the nanodiamond composites comprising nanodiamond, pyrolytic carbon, and nanosized pores were studied. The composites are p-type semiconductors and their resistance decreases by 12 orders of magnitude as the pyrocarbon-to-diamond ratio γ increases from 0 to 80 wt %. Evidence for paramagnetic properties of the nanodiamond composites was obtained. The observed properties are explained by increased concentration of surface Tamm states. The paramagnetic properties are explained in terms of the electron spins localized on the nanodiamond surface in the composite.

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Cent Res Inst Mat Fed Unitary Enterprise, St Petersburg, Russia
Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia
Inst Biophys, Siberian Branch,Russian Acad Sci, Krasnoyarsk, Russia;
Siberian Fed Univ, Youth Open Lab Perspect Res & Technol, Russia

Доп.точки доступа:
Kiselev, N. I.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Korchagina, S. B.; Petrakovskaya, E. A.; Петраковская, Элеонора Анатольевна; Vasil'ev, A. D.; Васильев, Александр Дмитриевич; Solov'ev, L. A.; Соловьев, Леонид Александрович; Balaev, D. A.; Балаев, Дмитрий Александрович; Bayukov, O. A.; Баюков, Олег Артемьевич; Denisov, I. A.; Денисов, И. А.; Tsegel'Nik, S. S.; Eremin, E. V.; Еремин, Евгений Владимирович; Znak, D. A.; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Shubin, A. A.; Shestakov, N. P.; Шестаков, Николай Петрович; Volkov, N. V.; Волков, Никита Валентинович; Gordeev, S. K.; Belobrov, P. I.; Белобров, Петр Иванович
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10.

    Electrical and dielectrical propeties of gas-sensor resistive type Bi2Sn2O7 / L. V. Udod [et al.] // Solid State Phenom. : Selected, peer reviewed papers. - 2014. - Vol. 215: Trends in Magnetism: Nanomagnetism (EASTMAG-2013). - P. 503-506, DOI 10.4028/www.scientific.net/SSP.215.503. - Cited References: 14. - This work was supported by the Russian Foundation for Basic Research projects no. 12-02-00125-а . - ISSN 978-30383. - ISSN 1662-9779
   Перевод заглавия: Электрические и диэлектрические свойства резистивного типа газовых сенсоров на основе Bi2Sn2O7
Кл.слова (ненормированные):
crystallographic structure -- polymorphic transformations -- electrical resistivity -- dielectric permeability
Аннотация: Polycrystalline samples of Bi2Sn2O7 have been synthesized by conventional solid-state reaction method. According to the X-ray powder diffraction research, our sample co-existing of two polymorphs phases: cubic and rhombic, concurrently. The real dielectric permeability Re (ε) monotonic grows versus temperature and the imaginary dielectric permeability Im (ε) nonmonotonic is increased at the heating. There are maxima at Т=450 K on both temperature dependences Im (ε) and Re (ε) reveal. Anomalies in the temperature dependence of electrical resistivity at temperatures are found and to be correlated with the α → β structural phase transition temperature.

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Доп.точки доступа:
Ovchinnikov, S. G. \ed.\; Овчинников, Сергей Геннадьевич; Samardak, A. \ed.\; Udod, L. V.; Удод, Любовь Викторовна; Sitnicov, M. N.; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Euro-Asian Symposium "Trends in MAGnetism": Nanomagnetism(5 ; 2013 ; sept. ; 15-21 ; Vladivostok)
}
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