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1.
11B ЯМР-исследование кобальтового
людвигита Co3BO5 / М. Е. Кашникова, Н. А. Уткин, Н. А. Смольников [и др.]> //
Новое в магнетизме и магнитных материалах : сборник трудов XXV международной конференции / прогр. ком.: Р. С. Исхаков, С. Г. Овчинников [и др.]. - 2024. -
Секция 6 [Сборник 6]
: Резонансные явления в магнетиках. - С. 25-28. - Библиогр.: 6. - Выполнено в рамках госзадания Минобрнауки № 122021000035-6 . - ISBN 978-5-4465-1869-2
Перевод заглавия:
11B NMR study of the
cobalt
ludwigite Co3BO5
Аннотация:
Впервые методами ядерного магнитного резонанса (ЯМР) выполнено исследование порошков оксибората кобальта Co3BO5 в широкой области температур (85 – 295 K) во внешнем магнитном поле H0 = 9.27 Тл. Определены параметры тензора градиента электрического поля (ГЭП) и магнитного сдвига линии ЯМР на позициях ядра-зонда 11B. Выделены орбитальный 11K0 и спиновый 11Ks вклады в сдвиг. Из температурных зависимостей сдвига и магнитной восприимчивости в Co3BO5 была определена константа сверхтонкого взаимодействия (СТВ) иона B3+ с ближайшим магнитным окружением.
Материалы конференции
Держатели документа:
Уральский федеральный университет имени Первого президента России Б.Н. Ельцина
Институт физики металлов им. М. Н. Михеева УрО РАН
Институт физики им. Л.В. Киренского Сибирского отделения Российской академии наук - обособленное подразделение ФИЦ КНЦ СО РАН
Доп.точки доступа:
Исхаков, Рауф Садыкович \прогр. ком.\; Iskhakov, R. S.; Овчинников, Сергей Геннадьевич \прогр. ком.\; Ovchinnikov, S. G.; Кашникова, М. Е.; Уткин, Н. А.; Смольников, Н. А.; Пискунов, Ю. В.; Садыков, А. Ф.; Казак, Наталья Валерьевна; Kazak, N. V.; "Новое в магнетизме и магнитных материалах", международная конференция(25 ; 2024 ; 1-6 июля ; Москва); Научный совет по физике конденсированных сред РАН; МИРЭА - Российский технологический университет; Московский государственный университет им. М.В. Ломоносова; Магнитное общество России
}
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2.
A study of
the synthesis products of fullerenes with nickel and
cobalt
/ E. A. Petrakovskaya [et al.]> // Tech. Phys. - 2001. -
Vol. 46
,
Is. 1
. - P. 42-46,
DOI
10.1134/1.1340883. - Cited References: 15 . - ISSN 1063-7842
РУБ
Physics, Applied
Рубрики:
COMPLEXES
SPECTRA
Аннотация:
Qualitative analysis of the products of plasmochemical synthesis of fullerenes with metallic nickel and
cobalt
has been carried out using electron paramagnetic resonance (EPR) and electron microscopy. These studies show that the synthesis products are mainly fullerenes, metallic nanoparticles coated with an insulating layer, and isolated atomic clusters. (C) 2001 MAIK "Nauka/Interperiodica".
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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirenskii Inst. of Physics, Siberian Branch, RAS, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Petrakovskaya, E. A.; Петраковская, Элеонора Анатольевна; Bulina, N. V.; Булина, Наталья Васильевна; Churilov, G. N.; Чурилов, Григорий Николаевич; Puzyr', A. P.
}
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3.
Ab initio LC-DFT
study of graphene, multilayer graphenes and graphite / P. V. Avramov [et al.]> // Chem. Phys. Lett. - 2011. -
Vol. 508
,
Is. 1-3
. - P. 86-89,
DOI
10.1016/j.cplett.2011.04.016. - Cited References: 32. - This work was supported by JAEA Research fellowship (P.V.A.). P.V.A. also acknowledges JAEA ASRC and Molecular Spintronics Group for hospitality and fruitful collaboration. . - ISSN 0009-2614
РУБ
Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
DENSITY
NANORIBBONS
PERFORMANCE
FUNCTIONALS
FULLERENE
COBALT
FILMS
Аннотация:
Atomic structure of graphene, bi-, tri-, tetralayer graphenes and graphite as well was studied using ab initio HSE, LDA and PBE DFT approaches in periodic boundary conditions. Based on comparison of theoretical results with experimental data the performance of the methods was estimated. It was found that long-range corrected HSE potential is the most reliable DFT approximation to reproduce the atomic structure of weakly bound multilayer graphenes and graphite as well. (C) 2011 Elsevier B. V. All rights reserved.
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Держатели документа:
[Avramov, Pavel V.
Sakai, Seiji
Entani, Shiro
Matsumoto, Yoshihiro
Naramoto, Hiroshi] Japan Atom Energy Agcy, Adv Sci Res Ctr, Naka, Ibaraki 3191195, Japan
[Avramov, Pavel V.] LV Kirenskii Inst Phys, SB RAS, Krasnoyarsk 660036, Russia
[Avramov, Pavel V.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
Доп.точки доступа:
Avramov, P. V.; Аврамов, Павел Вениаминович; Sakai, S.; Entani, S.; Matsumoto, Y.; Naramoto, Hiroshi
}
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4.
Allotropic modifications of
cobalt
upon chemical deposition / A. V. Chzhan, S. A. Podorozhnyak, V. K. Mal’tsev [et al.]> // Phys. Solid State. - 2021. -
Vol. 63
,
Is. 1
. - P. 42-46,
DOI
10.1134/S1063783421010054. - Cited References: 17. - This study was supported in part by the Russian Foundation for Basic Research, project no. 18-02-00161-a . - ISSN 1063-7834
Кл.слова (ненормированные):
Co–P thin magnetic films
--
chemical deposition
--
nuclear magnetic resonance
--
allotropic modifications of Co
Аннотация:
The effect of the solution acidity on the crystal structure of
cobalt
during its chemical deposition is reported. It has been shown using the structural and magnetic examination and nuclear magnetic resonance study that the change in the working solution acidity leads to deposition of
cobalt
with different allotropic modifications in the nearest environment: the hcp type in the small (up to ~8.5) pH region and the fcc type in the large (over ~8.5) pH region. The formation of these
cobalt
modifications is attributed to the size effects caused by a decrease in the particle size with increasing pH.
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Публикация на русском языке
Аллотропные модификации кобальта при химическом осаждении [Текст] / А. В. Чжан, С. А. Подорожняк, В. К. Мальцев [и др.] // Физ. тверд. тела. - 2021. - Т. 63 Вып. 1. - С. 43-47
Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Krasnoyarsk State Agrarian University, Krasnoyarsk, 660049, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Chzhan, A. V.; Podorozhnyak, S. A.; Mal'tsev, V. K.; Мальцев, Вадим Константинович; Krayukhin, I. N.; Patrin, G. S.; Патрин, Геннадий Семёнович
}
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5.
An effective method
of magnetic hyperthermia based on the ferromagnetic resonance phenomenon / S. V. Stolyar, O. A. Li, E. D. Nikolaeva [et al.]> // Phys. Met. Metallogr. - 2023. -
Vol. 124
,
Is. 2
. - P. 174-180,
DOI
10.1134/S0031918X22601834. - Cited References: 15. - This study was supported by grant no. 22-14-20020 from the Russian Science Foundation and the Krasnoyarsk Regional Fund for Support of Scientific and Technological Activities. The authors are grateful to the Krasnoyarsk Regional Center for Collective Use at Federal Research Center Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, for providing their research facilities . - ISSN 0031-918X. - ISSN 1555-6190
Кл.слова (ненормированные):
ferromagnetic resonance
--
cobalt
ferrite
--
nickel ferrite
--
magnetic hyperthermia
Аннотация:
Nickel and
cobalt
ferrite nanoparticles have been synthesized using the chemical precipitation method; the nanoparticle sizes were found to be 63 ± 22 and 26 ± 4 nm, respectively. The static hysteresis loops and Mossbauer spectra have been measured. It is shown that
cobalt
ferrite powders are magnetically harder than nickel ferrite powders. Ferromagnetic resonance (FMR) curves have been studied. It is found that the FMR absorption for
cobalt
ferrite is observed at room temperature and above. The time dependences of the nanoparticle warm-up under FMR conditions have been measured. The maximum temperature changes for nickel ferrite and
cobalt
ferrite particles are 8 and 11 K, respectively. Using the example of
cobalt
ferrite powder, the possibility of effectively heating of particles in the FMR mode in their own field without using a DC magnetic field source is shown. The observed effect can be used in magnetic hyperthermia.
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Публикация на русском языке
Эффективный способ магнитной гипертермии, основанный на явлении ферромагнитного резонанса [Текст] / С. В. Столяр, О. А. Ли, Е. Д. Николаева [и др.] // Физ. металлов и металловед. - 2023. - Т. 124 № 2. - С. 182-189
Держатели документа:
Federal Research Center, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia
Institute of Physics, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Доп.точки доступа:
Stolyar, S. V.; Li, O. A.; Nikolaeva, E. D.; Vorotynov, A. M.; Воротынов, Александр Михайлович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Bayukov, O. A.; Баюков, Олег Артемьевич; Iskhakov, R. S.; Исхаков, Рауф Садыкович; P’yankov, V. F.; Volochaev, M. N.; Волочаев, Михаил Николаевич
}
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6.
Anisotropic thermal expansion
and electronic transitions in the Co3BO5 ludwigite / N. Kazak, A. Arauzo, J. Bartolome [et al.]> // Dalton Trans. - 2022. -
Vol. 51
,
Is. 16
. - P6345-6357,
DOI
10.1039/d2dt00270a. - Cited References: 57. - We are grateful to the Russian Foundation for Basic Research (project no. 20-02-00559 and 21-52-12033) for supporting this paper. This work was performed within the framework of the budget project no. 0287-2021-0013 for the Institute of Chemistry and Chemical Technology SB RAS. We acknowledge the financial support from the Spanish Ministry of Economy, Industry and Competitiviness (MINECO), (Grant No. MAT2017-83468-R) and from the regional Government of Aragón (E12-20R RASMIA project) . - ISSN 1477-9226
Кл.слова (ненормированные):
Activation energy
--
Anisotropy
--
Cobalt
compounds
--
Crystal structure
--
Electric conductivity
--
Electronic properties
--
Magnetic moments
--
Magnetic susceptibility
--
Negative thermal expansion
Аннотация:
The investigations of the crystal structure, magnetic and electronic properties of Co3BO5 at high temperatures were carried out using powder X-ray diffraction, magnetic susceptibility, electrical resistivity, and thermopower measurements. The orthorhombic symmetry (Sp.gr. Pbam) was observed at 300 K and no evidence of structural phase transitions was found up to 1000 K. The compound shows a strong anisotropy of the thermal expansion. A large negative thermal expansion along the a-axis is observed over a wide temperature range (T = 300–600 K) with αa = −35 M K−1 at T = 500 K with simultaneous expansion along the b- and c-axes with αb = 70 M K−1 and αc = 110 M K−1, respectively. The mechanisms of thermal expansion are explored by structural analysis. The activation energy of the conductivity decreases significantly above 700 K. Electronic transport was found to be a dominant conduction mechanism in the entire temperature range. The correlations between the thermal expansion, electrical resistivity, and effective magnetic moment were revealed and attributed to the evolution of the spin state of Co3+ ions towards the spin crossover and gradual charge-ordering transition.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Instituto de Nanociencia y Materiales de Aragon (INMA), CSIC-Universidad de Zaragoza and Departamento de Fisica de la Materia Condensada, Zaragoza, 50009, Spain
Servicio de Medidas Fisicas, Universidad de Zaragoza, Zaragoza, 50009, Spain
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Arauzo, A.; Bartolome, J.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Solovyov, L.; Borus, A.; Борус, Андрей Андреевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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7.
Boron mobility in
sintered (Pr, Dy)–(Fe, Co)–B materials with a high
cobalt
content / E. N. Kablov [et al.]> // Russ. Metall. (Metally). - 2014. -
Vol. 2014
,
Is. 9
. - P. 721–724,
DOI
10.1134/S0036029514090080. - Cited References: 15 . - ISSN 0036-0295. - ISSN 1555-6255
Аннотация:
Sintered (Pr, Dy)–(Fe1 – yCoy)–B materials with up to y ≈ 0.5 atomic fractions have been studied. Boron is found to be a movable element, and its diffusion between principal magnetic phase A and other boron containing phases determines the properties of the materials. The structure of principal magnetic phase grains is sufficiently complex: their periphery is enriched in boron. The enrichment is shown to cause a decrease in the coercive force of the materials to zero after sintering.
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Публикация на русском языке
Подвижность бора в спеченных материалах (Pr,Dy)-(Fe,Co)-B с высоким содержанием кобальта [Текст] / Е. Н. Каблов [и др.] // Металлы : НПП "Элиз", 2014. - № 5. - С. 47-51
Держатели документа:
All-Russia Scientific Research Institute of Aviation Materials, ul. Radio 17, Moscow, 105005, Russian Federation
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Kablov, E. N.; Piskorskii, V. P.; Valeev, R. A.; Ospennikova, O. G.; Rezchikova, I. I.; Volkov, N. V.; Волков, Никита Валентинович; Shaikhutdinov, K. A.; Шайхутдинов, Кирилл Александрович
}
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8.
Chiromagnetic oxide
cobalt
nanoparticles: synthesis and magnitooptical properties / A. V. Kurilova, D. I. Klimenko, E. V. Kundelev [et al.]> //
VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022) : Book of abstracts / program com. S. G. Ovchinnikov [et al.]. - 2022. -
Vol. 1
,
Sect.
: Spintronics and magnetic nanostructures. - Ст. A.P59. - P. 209-210. - Cited References: 7. - The reported study was funded by RFBR, project number 20-32-90144 . - ISBN 978-5-94469-051-7
Материалы симпозиума
, ,
Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
University ITMO, Sant-Peterburg, Russia
Siberian Federal University, Krasnoyarsk, Russia
Доп.точки доступа:
Ovchinnikov, S. G. \program com.\; Овчинников, Сергей Геннадьевич; Kurilova, A. V.; Klimenko, D. I.; Kundelev, E. V.; Sukhachev, A. L.; Сухачев, Александр Леонидович; Shulga, K. V.; Dubavik, A. U.; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Российская академия наук; Физико-технический институт им. Е.К. Завойского ФИЦ Казанского научного центра РАН; Казанский (Приволжский) федеральный университет; Euro-Asian Symposium "Trends in MAGnetism"(8 ; 2022 ; Aug. ; 22-26 ; Kazan); "Trends in MAGnetism", Euro-Asian Symposium(8 ; 2022 ; Aug. ; 22-26 ; Kazan)
}
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9.
Co5/3Nb1/3BO4: A new
cobalt
oxyborate with a complex magnetic structure / N. V. Kazak, N. A. Belskaya, E. M. Moshkina [et al.]> // J. Magn. Magn. Mater. - 2021. -
Vol. 534
. - Ст. 168056,
DOI
10.1016/j.jmmm.2021.168056. - Cited References: 50. - The authors acknowledge M. Molokeev for the orientating the single crystal for magnetic measurements. The X-ray diffraction and specific heat measurements were carried out in the Common Access Facility Centres of SB RAS (Krasnoyarsk, Russia) and P.N. Lebedev Physical Institute of RAS (Moscow, Russia). This work has been financed by the Russian Foundation for Basic Research (project no. 20-02-00559). We acknowledge financial support from the Spanish MINECO DWARFS project MAT2017-83468-R and Gobierno de Aragón (Group, E12-20R) . - ISSN 0304-8853
Кл.слова (ненормированные):
Warwickites
--
Ferrimagnet
Аннотация:
Needle-shape single crystals of Co5/3Nb1/3BO4 warwickite were grown using the flux technique. X-ray diffraction measurements have revealed an orthorhombic structure (Sp. Gr. Pbnm) where the octahedral M1 site is occupied by a mixture of Co2+/Nb5+ ions and the M2 site is exclusively filled by Co2+ ions. Using dc magnetization measurements it was established that the new material undergoes two magnetic transitions: an antiferromagnetic transition at TN1 = 27 K and a ferrimagnetic one at TN2 = 14 K, below which a hysteresis cycle opens. Both magnetic transitions are marked by anomalies in the specific heat. High magnetic anisotropy with c-axis as a hard magnetization direction was detected.
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Держатели документа:
Kirensky Institute of Physics, FRC SB RAS, Krasnoyarsk, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Instituto de Nanociencia y Materiales de Aragon (INMA), CSIC-Universidad de Zaragoza and Departamento de Fisica de la Materia Condensada, Zaragoza, 50009, Spain
Servicio de Medidas Fisicas, Universidad de Zaragoza, Zaragoza, Spain
P.N. Lebedev, Physical Institute of RAS, Moscow, 119991, Russian Federation
Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Belskaya, N. A.; Moshkina, E. M.; Мошкина, Евгения Михайловна; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Bartolome, J.; Arauzo, A.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Gavrilkin, S. Y.; Gorev, M. V.; Горев, Михаил Васильевич; Patrin, G. S.; Патрин, Геннадий Семёнович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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10.
Cobalt
ferrite nanoparticles
in a mesoporous silicon dioxide matrix / S. V. Komogortsev [et al.]> // Tech. Phys. Lett. - 2009. -
Vol. 35
,
Is. 10
. - P. 882-884,
DOI
10.1134/S1063785009100022. - Cited References: 10. - This study was supported in part by the Federal Program "Development of the Scientific Potential of Higher Education" (project no. RNP. 2.1.1/2584) and jointly by the Krasnoyarsk Regional Science Foundation and the Russian Foundation for Basic Research (project nos. r-Enisei-a 03-07-96803 and 09-02-98002-r_sibir'_a). . - ISSN 1063-7850
РУБ
Physics, Applied
Рубрики:
MAGNETIC-PROPERTIES
NANOSIZED COFE2O4
ANISOTROPY
POWDERS
CURVES
Аннотация:
We have studied magnetic nanoparticles of
cobalt
ferrite obtained by the extraction-pyrolysis method in a mesoporous silicon dioxide (MSM-41) molecular sieve matrix. The X-ray diffraction data show evidence for the formation of CoFe(2)O(4) particles with a coherent scattering domain size of similar to 40 nm. Measurements of the magnetization curves showed that powders consisting of these nanoparticles are magnetically hard materials with a coercive field of H (c)(4.2 K) = 9.0 kOe and H (c)(300 K) = 1.8 kOe and a reduced remanent magnetization of M (r)/M (s)(4.2 K) = 0.83 and M (r)/M (s)(300 K) = 0.49. The shape of the low-temperature (4.2 K) magnetization curves is adequately described in terms of the Stoner-Wohlfarth model for randomly oriented single-domain particles with a cubic magnetic anisotropy.
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Держатели документа:
[Komogortsev, S. V.] Russian Acad Sci, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia
Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia
Siberian State Technol Univ, Krasnoyarsk 660049, Russia
ИФ СО РАН
ИХХТ СО РАН
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk 660041, Russian Federation
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian State Technological University, Krasnoyarsk 660049, Russian Federation
Доп.точки доступа:
Komogortsev, S. V.; Комогорцев, Сергей Викторович; Patrusheva, T. N.; Патрушева, Тамара Николаевна; Balaev, D. A.; Балаев, Дмитрий Александрович; Denisova, E. A.; Денисова, Елена Александровна; Ponomarenko, I. V.; Development of the Scientific Potential of Higher Education [RNP. 2.1.1/2584]; Krasnoyarsk Regional Science Foundation; Russian Foundation for Basic Research [r-Enisei-a 03-07-96803, 09-02-98002-r_sibir'_a]
}
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11.
Cobalt
-based bulk nanostructured
materials prepared via the dynamic compacting of core–shell composite particles / E. A. Denisova [et al.]> // Bull. Russ. Acad. Sci. Phys. - 2016. -
Vol. 80
,
Is. 11
. - P. 1377-1380,
DOI
10.3103/S1062873816110198. - Cited References: 12. - This work was supported by the Russian Foundation for Basic Research, project nos. 15-08-06673, 16-03-00969, and RFBR and KRFS 15-42-04171. . - ISSN 1062-8738
Кл.слова (ненормированные):
Composite materials
--
Bulk nanostructured materials
--
Chemical deposition
--
Cobalt
-based
--
Composite particles
--
Dynamic compaction
--
Magnetic characteristic
--
Nano-structured
--
Structural and magnetic characteristics
--
Powders
Аннотация:
Bulk nanostructured Co–P/Cu and Al2O3/Co–P composites are fabricated via dynamic compaction. The initial core–shell particles are synthesized by means of chemical deposition. Structural and magnetic characteristics of the composites are investigated. It is shown that the use of composite particles allows homogeneous compacts with the structure and magnetic characteristics of initial powders to be obtained. © 2016, Allerton Press, Inc.
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Публикация на русском языке
Объемные наноструктурированные материалы на основе кобальта, полученные динамическим компактированием композиционных частиц “ядро–оболочка” [Текст] / Е. А. Денисова [и др.] // Изв. РАН. Сер. физич. - 2016. - Т. 80 № 11. - С. 1555-1558
Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Krasnoyarsk Institute of Railway Engineering, Krasnoyarsk, Russian Federation
ZAO Pulsed Technologies, Krasnoyarsk, Russian Federation
Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Denisova, E. A.; Денисова, Елена Александровна; Kuzovnikova, L. A.; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Kuzovnikov, A. A.; Nemtsev, I. V.; Mal'tsev, V. K.; Мальцев, Вадим Константинович
}
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12.
Conductivity study of
Co3O2BO3 and Co 3-xFexO2BO3 oxyborates / N. V. Kazak [et al.]> //
Solid State Phenomena. - 2009. -
Vol. 152-153
. - P104-107,
DOI
10.4028/www.scientific.net/SSP.152-153.104 . - ISSN 1012-0394
Кл.слова (ненормированные):
Doped cobaltite
--
Electrical conductivity
--
Ludwigite
--
Variable-range hopping
--
Crystal structure
--
Electric conductivity
--
Magnetic materials
--
Single crystals
--
Crystal structure
--
Electric conductivity
--
Magnetic materials
--
Magnetism
--
Single crystals
--
Electrical conductivity
--
Electrical resistivity
--
Experimental data
--
Mott variable-range hopping
--
Oxyborates
--
Temperature regions
--
Variable-range hopping
--
Doped cobaltite
--
Ludwigite
--
Variable range hopping
--
Cobalt
--
Cobalt
Аннотация:
Single crystals of
cobalt
oxyborates Co3O2BO 3 and Co3-xFexO2BO3 were synthesized. The crystal structure and electric properties were investigated. The difference in the electrical resistivity behaviors was found. For parent Co3O2BO3 nor simple activation law, nor Mott variable range hopping (VRH) are acquirable to describe the experimental data in wide temperature region. In contrast for Co3-xFex O 2BO3 Mott's variable-range hopping conductivity clearly dominates.
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eLibrary
Держатели документа:
L.V. Kirensky Institute of Physics, SB of RAS, 660036, Akademgorodok, Krasnoyarsk, Russian Federation
Politechnical Institute, Siberian Federal University, Kirensky str. 26, 660074 Krasnoyarsk, Russian Federation
Доп.точки доступа:
Kazak, N. V.; Казак, Наталья Валерьевна; Ivanova, N. B.; Иванова, Наталья Борисовна; Rudenko, V. V.; Руденко, Валерий Васильевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Vasil'Ev, A. D.; Васильев, Александр Дмитриевич; Knyazev, Yu. V.; Князев, Юрий Владимирович; Moscow International Symposium on Magnetism(4 ; 2008 ; Jun. ; Moscow)
}
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13.
Contribution of the
multiplicity fluctuation in the temperature dependence of phonon spectra of rare-earth cobaltites / Y. S. Orlov, A. E. Sokolov, V. A. Dudnikov [et al.]> // Molecules. - 2020. -
Vol. 25
,
Is. 18
. - Ст. 4316,
DOI
10.3390/molecules25184316. - Cited References: 34. - This work was supported by the Russian Science Foundation grant 18-02-00022. The scanning electron microscopy investigations were conducted in the SFU Joint Scientific Center, supported by the State assignment (#FSRZ-2020-0011) of the Ministry of Science and Higher Education of the Russian Federation. The other research was carried out at the Krasnoyarsk Regional Center of Research Equipment of the Federal Research Center “Krasnoyarsk Science Center SB RAS” . - ISSN 1420-3049
Кл.слова (ненормированные):
Rare-earth
cobalt
oxides
--
Multiplicity fluctuations
--
Phonon spectra
Аннотация:
We have studied, both experimentally and theoretically, the unusual temperature dependence of the phonon spectra in NdCoO3, SmCoO3 and GdCoO3, where the Co3+ ion is in the low-spin (LS) ground state, and at the finite temperature, the high-spin (HS) term has a nonzero concentration nHS due to multiplicity fluctuations. We measured the absorption spectra in polycrystalline and nanostructured samples in the temperature range 3–550 K and found a quite strong breathing mode softening that cannot be explained by standard lattice anharmonicity. We showed that the anharmonicity in the electron–phonon interaction is responsible for this red shift proportional to the nHS concentration.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Доп.точки доступа:
Orlov, Yu. S.; Орлов, Юрий Сергеевич; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Shulga, K. V.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Shestakov, N. P.; Шестаков, Николай Петрович; Vysotin, M. A.; Высотин, Максим Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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14.
Conversion of magnetic
anisotropy in electrodeposited Co-Ni alloy nanowires / A. S. Samardak [et al.]> // J. Magn. Magn. Mater. - 2015. -
Vol. 383
. - P. 94-99,
DOI
10.1010/j.jmmm.2014.10.047. - Cited References:24. - This work was supported in part by the Russian Ministry of Education and Science and Far Eastern Federal University. M.N acknowledges the student financial support of Iranian Nanotechnology Initiative Council. . - ISSN 0304. - ISSN 1873-4766
Перевод заглавия:
Конверсия магнитной анизотропии в электроосажденных нанонитях сплава CoNi
РУБ
Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
COBALT
NANOWIRES
ARRAYS
Кл.слова (ненормированные):
Coercive force
--
Magnetic anisotropy
--
Magnetic hysteresis
--
Binary alloy
--
nanowires
--
Alumina template
--
Electrodeposition
Аннотация:
In this paper, the influence of alternating current (ac) electrodeposition frequency and waveform is reported on chemical composition, microstructure and consequently magnetic properties of Co-Ni binary alloy nanowire arrays embedded in an alumina template. For sinusoidal and square electrodeposition waveforms the easy axis of magnetization rotates from being parallel to perpendicular orientation to nanowire long axis as the deposition frequency increases from 200 to 800 Hz. The reason for the drastic change of magnetic anisotropy in nanowires is attributed to the increase of
cobalt
content and the crystal structure phase transformation from fcc-hcp mixture at high Ni content to imp at high Co content. We explain the conversion of magnetic behavior of nanowire arrays in terms of a competition between the shape and magnetocrystalline anisotropies. (C) 2014 Elsevier B.V. All rights reserved.
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Держатели документа:
Far Eastern Fed Univ, Sch Nat Sci, Vladivostok, Russia.
Sahand Univ Technol, Fac Mat Engn, Tabriz, Iran.
SB Russian Acad Sci, Inst Phys, Krasnoyarsk, Russia.
Доп.точки доступа:
Samardak, A. S.; Nasirpouri, F.; Nadi, M.; Sukovatitsina, E. V.; Ognev, A. V.; Chebotkevich, L. A.; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Russian Ministry of Education and Science; Far Eastern Federal University; Iranian Nanotechnology Initiative Council
}
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15.
Core-shell and bi-segmented
cobalt
-nickel nanorods prepared by electroless deposition / E. A. Denisova, L. A. Chekanova, S. V. Komogortsev [et al.]> // IEEE Trans. Magn. - 2022. -
Vol. 58
,
Is. 2
. - Ст. 2300805,
DOI
10.1109/TMAG.2021.3098747. - Cited References: 27. - This work was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20-43-240003. The authors thank the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center“ Krasnoyarsk Science Center SB RAS” for the provided equipment . - ISSN 0018-9464
Кл.слова (ненормированные):
bi-segmented Co-Ni rods
--
core-shell rods
--
magnetic properties
--
electroless deposition
Аннотация:
A porous polymer loaded with segmented nanorods of magnetic metal is very promising for the design of novel microwave devices. Arrays of bi-segmented Ni/Co and core-shell Ni@Co rods were prepared by electroless deposition into porous of polycarbonate track etched membrane. An intrinsic effective magnetic field of the magnetic composite nanorods aligned in the nonmagnetic template was studied by magnetization curves and ferromagnetic resonance. The effect of the interface boundaries for two types of bi-segmented rods with coaxial and along-axis Co/Ni segmentation to effective field was established.
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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.
Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation.
Far Eastern Federal University, Vladivostok, 690950, Russian Federation.
Доп.точки доступа:
Denisova, E. A.; Денисова, Елена Александровна; Chekanova, L. A.; Чеканова, Лидия Александровна; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Rautsky, M. V.; Рауцкий, Михаил Владимирович; Nemtsev, I. V.; Немцев, Иван Васильевич; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Plotnikov, V. S.; Tkachev, V. V.; Li, O. A.; Dolgopolova, M. V.
}
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16.
Core-shell and Bi-segmented
cobalt
-nickel nanorods prepared by electroless deposition / E. A. Denisova, L. A. Chekanova, S. V. Komogortsev [et al.]> //
IEEE International Magnetics Virtual Conference (INTERMAG'21) : Digest book. - 2021. - P. 1342. - Cited References: 2. - This work was funded by the RFBR, the Government of the Krasnoyarsk Territory, the KRFS (project no. 20-43-240003)
Перевод заглавия:
Бисегментированные и ядро-оболочка наностержни Co-Ni , полученные методом химического осаждения
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Доп.точки доступа:
Denisova, E. A.; Денисова, Елена Александровна; Chekanova, L. A.; Чеканова, Лидия Александровна; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Nemtsev, I. V.; Немцев, Иван Васильевич; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Tkachev, V. V.; Plotnikov, V. S.; Dolgopolova, M. V.; IEEE International Magnetics Conference(2021 ; Apr. 26-30 ; Lion, France (Virtual))
}
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17.
Crystal and molecular
structure of the complex of N-(1-silatranylmethyl)-3,5-dimethylpyrazole with
cobalt
dichloride / M. G. Voronkov [et al.]> // J. Struct. Chem. - 2012. -
Vol. 53
,
Is. 3
. - P. 614-617,
DOI
10.1134/S0022476612030316. - Cited References: 11 . - ISSN 0022-4766
РУБ
Chemistry, Inorganic & Nuclear + Chemistry, Physical
Кл.слова (ненормированные):
N-(1-silatranylmethyl)-3,5-dimethylpyrazole
--
cobalt
dichloride
--
molecular structure
--
single crystal X-ray diffraction
Аннотация:
X-ray diffraction is used to determine the crystal and molecular structure of the complex of N-(1-silatranylmethyl)-3,5-dimethylpyrazole with
cobalt
dichloride (I). This is yet another example of the participation of the endocyclic oxygen atom of the silatrane fragment in complexation with a metal atom. Metal dichloride interconnects two heterocyclic systems of dimethylpyrazole (DMP) and silatrane (Sa). The coordination polyhedron of the
cobalt
atom is a tetrahedron.
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Публикация на русском языке
Кристаллическая и молекулярная структура комплекса N-(1-силатранилметил)-3,5-диметилпиразола с дихлоридом кобальта [Текст] / М. Г. Воронков [и др.] // Журн. структ. химии. - Новосибирск : Изд-во СО РАН, 2012. - Т. 53 № 3. - С. 619-622
Держатели документа:
[Voronkov, M. G.
Soldatenko, A. S.
Bolgova, Yu. I.
Trofimova, O. M.] Russian Acad Sci, Siberian Div, AE Favorsky Inst Chem, Irkutsk 664003, Russia
[Zel'bst, E. A.] E Siberian State Educ Acad, Irkutsk, Russia
[Vasiliev, A. D.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk, Russia
Доп.точки доступа:
Voronkov, M. G.; Zel'bst, E. A.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Soldatenko, A. S.; Bolgova, Y. I.; Trofimova, O. M.
}
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18.
Crystal size: Versus
paddle wheel deformability: Selective gated adsorption transitions of the switchable metal-organic frameworks DUT-8(Co) and DUT-8(Ni) / S. Ehrling [et al.]> // J. Mater. Chem. A. - 2019. -
Vol. 7
,
Is. 37
. - P. 21459-21475,
DOI
10.1039/c9ta06781g. - Cited References: 106. - The authors thank DFG (FOR 2433) for financial support. We thank HZB for the allocation of synchrotron radiation beam-time and financial support. PP, TW and TH used high performance facilities of ZIH Dresden. TW thanks the European Social Funds for Germany for a PhD fellowship. . - ISSN 2050-7488
Кл.слова (ненормированные):
Cobalt
--
Crystallite size
--
Density functional theory
--
Dichloromethane
--
Inclusions
--
Nickel
--
Organometallics
--
Particle size
--
Physisorption
--
Single crystals
--
Wheels
--
X ray powder diffraction
Аннотация:
Switchable pillared layer metal–organic frameworks M2(2,6-ndc)2(dabco) (DUT-8(M), M = Ni, Co, 2,6-ndc = 2,6-naphthalenedicarboxylate, dabco = 1,4-diazabicyclo-[2.2.2]octane, DUT – Dresden University of Technology) were synthesised in two different crystallite size regimes to produce particles up to 300 μm and smaller particles around 0.1 μm, respectively. The textural properties and adsorption-induced switchability of the materials, obtained from both syntheses, were studied by physisorption of N2 at 77 K, CO2 at 195 K and n-butane at 273 K, revealing pronounced differences in adsorption behavior for Ni and Co analogues. While the smaller nano-sized particles (50–200 nm) are rigid and show no gating transitions confirming the importance of crystallite size, the large particles show pronounced switchability with characteristic differences for the two metals resulting in distinct recognition effects for various gases and vapours. Adsorption of various vapours demonstrates consistently a higher energetic barrier for the “gate opening” of DUT-8(Co) in contrast to DUT-8(Ni), as the “gate opening” pressure for Co based material is shifted to a higher value for adsorption of dichloromethane at 298 K. Evaluation of crystallographic data, obtained from single crystal and powder X-ray diffraction analysis, showed distinct geometric differences in the paddle wheel units of the respective MOFs. These differences are further disclosed by solid-state UV-vis, FT-IR and Raman spectroscopy. Magnetic properties of DUT-8(Co) and DUT-8(Ni) were investigated, indicating a high-spin state for both materials at room temperature. Density functional theory (DFT) simulations confirmed distinct energetic differences for Ni and Co analogues with a higher energetic penalty for the structural “gate opening” transformation for DUT-8(Co) compared to DUT-8(Ni) explaining the different flexibility behaviour of these isomorphous MOFs.
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Держатели документа:
Department of Inorganic Chemistry, Technische Universitat Dresden, Bergstrasse 66, Dresden, 01069, Germany
University of Sofia, Faculty of Chemistry and Pharmacy, Sofia, 1126, Bulgaria
Leibniz Institute for Solid State and Materials Research, IFW Dresden, Helmholtz-strasse 20, Dresden, 01069, Germany
Wilhelm-Ostwald-Institute of Physical and Theoretical Chemistry, Faculty for Chemistry and Mineralogy, Leipzig University, Leipzig, 04103, Germany
Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Research Site Leipzig, Permoserstr. 15, Leipzig, 04318, Germany
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodny Prospect 79, Krasnoyarsk, 660041, Russian Federation
Institute of Automation and Electrometry of the SB RAS, Novosibirsk, 630090, Russian Federation
Research Group Macromolecular Crystallography, Helmholtz-Zentrum Berlin fur Materialien und Energie, Albert-Einstein-Stra?e 15, Berlin, 12489, Germany
Department of Theoretical Chemistry, Technische Universitat Dresden, Berg-strasse 66, Dresden, 01069, Germany
Доп.точки доступа:
Ehrling, S.; Senkovska, I.; Bon, V.; Evans, J. D.; Petkov, P.; Krupskaya, Y.; Kataev, V.; Wulf, T.; Krylov, A. S.; Крылов, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Krylova, S. N.; Крылова, Светлана Николаевна; Adichtchev, S.; Slyusareva, E.; Weiss, M. S.; Buchner, B.; Heine, T.; Kaskel, S.
}
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19.
Crystal structure and
magnetic properties of Mn substituted ludwigite Co3O2BO3 / Yu. V. Knyazev [et al.]> // J. Magn. Magn. Mater. - 2012. -
Vol. 324
,
Is. 6
. - P. 923-927,
DOI
10.1016/j.jmmm.2011.07.044. - Cited References: 15. - The study was supported by the Russian Foundation for Basic Research (Project no. 09-02-00171-a), the Federal Agency for Science and Innovation (Rosnauka) (Project no. MK-5632.2010.2), the Physical Division of the Russian Academy of Science, the program "Strongly Correlated Electrons", Project 2.3.1. . - ISSN 0304-8853
Перевод заглавия:
Кристаллическая структура и магнитные свойства Mn-замещенного людвигита Co3O2BO3
РУБ
Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
BOND VALENT SUMS
COORDINATION CHEMISTRY
OXIDATION -STATE
O BONDS
COMPLEXES
MANGANESE
COBALT
Кл.слова (ненормированные):
Transition metal oxyborate
--
Distinct crystallographic position
--
Spin glass magnetic ordering
Аннотация:
The needle shape single crystals Co3−x MnxO2BO3 with ludwigite structure have been prepared. According to the X-ray diffraction data the preferable character of distinct crystallographic positions occupation by Mn ions is established. Magnetization field and temperature dependencies are measured. Paramagnetic Curie temperature value Θ=−100 K points out the predominance of antiferromagnetic interactions. Spin-glass magnetic ordering takes the onset at TN=41 K. The crystallographic and magnetic properties of Co3O2BO3:Mn are compared with the same for the isostructural analogs Co3O2BO3 and CoO2BO3:Fe.
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Доп.точки доступа:
Knyazev, Yu.V.; Князев, Юрий Владимирович; Ivanova, N. B.; Иванова, Наталья Борисовна; Kazak, N. V.; Казак, Наталья Валерьевна; Platunov, M. S.; Платунов, Михаил Сергеевич; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Yurkin, G. Yu.; Юркин, Глеб Юрьевич
}
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20.
Crystal structure and
thermoelectric properties of mechanically activated LaCoO3 / V. A. Dudnikov, Yu. S. Orlov, L. A. Solovyov [et al.]> // J. Taiwan Inst. Chem. Eng. - 2024. -
Vol. 162
. - Ст. 105560,
DOI
10.1016/j.jtice.2024.105560. - Cited References: 88. - This study was supported by the Russian Science Foundation , project no. 24-22-00091 . - ISSN 1876-1070. - ISSN 1876-1089
Кл.слова (ненормированные):
Rare-earth
cobalt
oxides
--
Crystal structure
--
Thermoelectric properties
--
Mechanical activation
Аннотация:
Background: Crystal structure of rare-earth LaCoO3
cobalt
oxide subjected to high energy mechanical activation has been studied. In the temperature range of 300–800 K, the electrical conductivity and Seebeck coefficient were measured. Thermal conductivity was measured at 300–480 K. Methods: Comparative analysis of thermoelectric properties of the samples prepared by standard solid-state reaction and using high-energy mechanical activation was carried out. Findings: It was found that the experimental X-ray diffraction patterns are best described within the model that allows the coexistence of two domains in samples with the same crystal symmetry, but different lattice a and c parameters. The percentage ratio of these domains in the samples depends significantly on the size of the initial particles in the solid-state synthesis reaction and the annealing temperature. Mechanical activation and increase of synthesis temperature result in change of Seebeck coefficient sign and significant decrease of electrical resistivity. The Seebeck coefficient of non-activated samples takes positive values over the entire temperature range and decreases monotonically with increasing temperature, in contrast to mechanically activated samples exhibiting ambipolar behavior.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Siberian Federal University, Krasnoyarsk, 660041, Russia
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Solovyov, L. A.; Vereshchagin, S. N.; Ustyuzhanin, Yu. N.; Устюжанин, Юрий Николаевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Zeer, G. M.; Borus, A. A.; Борус, Андрей Андреевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
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полный формат
краткий формат
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