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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Tarasov I. A., Yakovlev I. A., Volochaev M. N., Nazarova Z.I., Nazarov A., Fedorov A. S., Varnakov S. N., Ovchinnikov S. G.
Заглавие : Growth and thermoelectric properties of composite thin films based on higher iron and manganese silicides
Коллективы : Asian School-Conference on Physics and Technology of Nanostructured Materials, Азиатская школа-конференция по физике и технологии наноструктурированных материалов
Место публикации : The Fifth Asian School-Conference on Physics and Technology of Nanostructured Materials: Proceedings. - VLadivostok: Dalnauka Publishing, 2020. - Ст.III.30.04p. - P.90. - ISBN 978-5-8044-1698-1
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zhandun V. S., Nemtsev A. V.
Заглавие : Ab initio comparative study of the magnetic, electronic and optical properties of AB2O4 (A, B= Mn, Fe) spinels
Место публикации : Mater. Chem. Phys. - 2021. - Vol. 259. - Ст.124065. - ISSN 0254-0584 (ISSN), DOI 10.1016/j.matchemphys.2020.124065. - ISSN 1879-3312 (eISSN)
Примечания : Cited References: 32. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project № 19-42-240016: «Control of structural, magnetic, electronic, and optical properties by pressure and intercalation into functional compounds with a spinel structure containing 3d and 4f ions » The calculations were performed with the computer resources of “Complex modeling and data processing research installations of mega-class” SRC “Kurchatovsky Institute” (http://ckp.urcki.ru)
Аннотация: The comparison of the magnetic, electronic, and optical properties of the spinel transition-metal oxides AB2O4 (A, B = Fe, Mn) and their relationship with the structure and composition were studied within DFT-GGA + U approximation. The spinels were considered both in the normal and inverse structure. We have found that regardless of composition and structure, the studied spinels are ferrimagnetic with antiparallel magnetic moments on A- and B-site cations. Electronic and structural properties of spinels depend on the composition: FeMn2O4 has a tetragonal structure and half-metallic properties; however, in the inverse FeMn2O4, the bandgap opens for the spin-up channel. MnFe2O4 is a cubic insulator with a bandgap of about 1.5 eV, which decreases in the inverse structure. The superexchange constants estimate within the simple indirect coupling model and have values close to the experimental ones. The total magnetization of FeMn2O4 is drop-down to zero under hydrostatic pressure above 60 GPa due to the strong dependence of the magnetic moment of octahedral manganese ion on the pressure. The microscopic mechanisms of the relationship between the structure, composition and properties are studied.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Xiao, Hui, Dang, Peipei, Yun, Xiaohan, Li, Guogang, Wei, Y.i., Xiao, Xiao, Zhao, Yajie, Molokeev M. S., Cheng, Ziyong, Lin, Jun
Заглавие : Solvatochromic Photoluminescent Effects in All-Inorganic Manganese(II)-Based Perovskites by Highly Selective Solvent-Induced Crystal-to-Crystal Phase Transformations
Место публикации : Angew. Chem. Int. Edit. - 2021. - Vol. 60, Is. 7. - P.3699-3707. - ISSN 1433-7851, DOI 10.1002/anie.202012383. - ISSN 1521-3773(eISSN)
Примечания : Cited References: 85. - This work was supported by National Natural Science Foundation of China (NSFC 51932009, 51772288, 52072349, 51672259) and the Joint Fund Project to Promote Science and Technology Cooperation Across the Taiwan Straits (U2005212), the Science and Technology Cooperation Fund between Chinese and Australian Governments (2017YFE0132300), CAS-Croucher Funding Scheme for Joint Laboratories (CAS18204), Chinese Academy of Sciences (YZDY-SSWJSC018)
Предметные рубрики: LEAD-FREE
HALIDE PEROVSKITE
NANOCRYSTALS
MN2+
LUMINESCENCE
Аннотация: The development of lead‐free perovskite photoelectric materials has been an extensive focus in the recent years. Herein, a novel one‐dimensional (1D) lead‐free CsMnCl3(H2O)2 single crystal is reported with solvatochromic photoluminescence properties. Interestingly, after contact with N,N‐dimethylacetamide (DMAC) or N,N‐dimethylformamide (DMF), the crystal structure can transform from 1D CsMnCl3(H2O)2 to 0D Cs3MnCl5 and finally transform into 0D Cs2MnCl4(H2O)2. The solvent‐induced crystal‐to‐crystal phase transformations are accompanied by loss and regaining of water of crystallization, leading to the change of the coordination number of Mn2+. Correspondingly, the luminescence changes from red to bright green and finally back to red emission. By fabricating a test‐paper containing CsMnCl3(H2O)2, DMAC and DMF can be detected quickly with a response time of less than one minute. These results can expand potential applications for low‐dimensional lead‐free perovskites.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Xiao, Hui, Dang, Peipei, Yun, Xiaohan, Li, Guogang, Wei, Yi, Wei, Yi, Xiao, Xiao, Zhao, Yajie, Molokeev M. S., Cheng, Ziyong, Lin, Jun
Заглавие : Solvatochromic photoluminescent effects in all-inorganic manganese(II)-based perovskites by highly selective solvent-induced crystal-to-crystal phase transformations
Место публикации : Angew. Chem. - 2021. - Vol. 133, Is. 7. - P.3743-3751. - ISSN 1521-3757 (eISSN), DOI 10.1002/ange.202012383
Примечания : Cited References: 73. - This work was supported by National Natural Science Foundation of China (NSFC 51932009, 51772288, 52072349, 51672259) and the Joint Fund Project to Promote Science and Technology Cooperation Across the Taiwan Straits (U2005212), the Science and Technology Cooperation Fund between Chinese and Australian Governments (2017YFE0132300), CAS-Croucher Funding Scheme for Joint Laboratories (CAS18204), Chinese Academy of Sciences (YZDY-SSWJSC018)
Аннотация: The development of lead‐free perovskite photoelectric materials has been an extensive focus in the recent years. Herein, a novel one‐dimensional (1D) lead‐free CsMnCl3(H2O)2 single crystal is reported with solvatochromic photoluminescence properties. Interestingly, after contact with N,N‐dimethylacetamide (DMAC) or N,N‐dimethylformamide (DMF), the crystal structure can transform from 1D CsMnCl3(H2O)2 to 0D Cs3MnCl5 and finally transform into 0D Cs2MnCl4(H2O)2. The solvent‐induced crystal‐to‐crystal phase transformations are accompanied by loss and regaining of water of crystallization, leading to the change of the coordination number of Mn2+. Correspondingly, the luminescence changes from red to bright green and finally back to red emission. By fabricating a test‐paper containing CsMnCl3(H2O)2, DMAC and DMF can be detected quickly with a response time of less than one minute. These results can expand potential applications for low‐dimensional lead‐free perovskites.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Kharkov A. M., Filipson G. Y.
Заглавие : Magnetic capacitance in variable-valence manganese sulfides
Место публикации : Phys. Status Solidi B. - 2020. - Vol. 257, Is. 5. - Ст.1900637. - ISSN 03701972 (ISSN), DOI 10.1002/pssb.201900637
Примечания : Cited References: 12. - This study was supported by the Russian Foundation for Basic Research No. 18-32-00079 mol_a. The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science No. 18-42-240001 r_a
Аннотация: The permittivity of TmxMn1–xS (0 < x < 0.15) solid solutions is measured in the frequency range of 102–106 Hz at temperatures of 300–500 K in magnetic fields of up to 12 kOe. The migration and relaxation conductivity contributions to the electric polarization are established. The relaxation time and activation energy are calculated using the Debye model. A decrease in the capacitance and relaxation time in a magnetic field is observed. The electron polarization relaxation channel provided by recombination of the electron–hole pairs is found using the infrared spectroscopy investigations.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Верпекин, Виктор Васильевич, Васильев, Александр Дмитриевич, Павленко, Нина Ивановна, Зимонин, Дмитрий Валерьевич, Бурмакина, Галина Вениаминовна
Заглавие : Реакции фенилацетиленидных комплексов золота (i) и фенилвинилиденов марганца и рения
Коллективы : Полифункциональные химические материалы и технологии, Томский государственный университет
Место публикации : Полифункциональные химические материалы и технологии: матер. междунар. науч. конф. : в 2-х т. - 2019. - Т. 1. - С. 172-173. - ISBN 978-5-6042143-9-8
Примечания : Исследование выполнено при финансовой поддержке Российского фонда фундаментальных исследований, Правительства Красноярского края, Красноярского краевого фонда науки в рамках научного проекта «Новые соединения на основе золота и благородных металлов: синтез, физико-химические свойства, каталитическая способность» (грант №18-43-240010)
Аннотация: A reactivity of gold phenylacetylides (L)Au-C=C-Ph (L = SMe2, C4H8S, C5H5N) towards the vinylidene complexes of rhenium and manganese containing a metallaallene system M=C=C are studied for the first time.
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Romanova O. B., Udod L. V., Demidenko O. F.
Заглавие : Structural properties of sulfides chalcogenides manganese substituted by elements with variable valency
Коллективы : International Scientific Conference Transport of Siberia 2020
Место публикации : IOP Conf. Ser.: Mater. Sci. Eng. - 2020. - Vol. 918, Is. 1. - Ст.012101. - DOI 10.1088/1757-899X/918/1/012101
Примечания : Cited References: 33. - The reported study was funded by RFBR according to the research project №20-52-00005 Bel_a
Аннотация: The structure and transport of YbXMn1-XS and TmXMn1-XS sulfides (0.05=X=0.2) was studied in the temperature range 80-500K. The temperature ranges of local deformations and a decrease of the thermal expansion coefficient with increasing concentration X caused of anomalous compressibility in the magnetically ordered region are determined for a system doped with ytterbium. Pinning temperatures of lattice polarons are established, which are accompanied by lattice deformation and IR mode condensation for a system doped with thulium.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Sitnikov M. N., Kharkov A. M., Konovalov S. O., Vorotinov A. M.
Заглавие : Magnetoimpedance, Jahn-Teller transitions upon electron doping of manganese sulfide
Место публикации : J. Magn. Magn. Mater. - 2020. - Vol. 513. - Ст.167104. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2020.167104
Примечания : Cited References: 42. - This study was supported by youth project_Reshetnev Siberian State University of Science and Technology
Аннотация: The effect of a magnetic field on the electrical and magnetic properties of manganese sulfide upon electron doping in the YbxMn1−xS (0.05 ˂ x ˂ 0.2) compound has been investigated. The change in the conductivity type from the Poole–Frenkel to Mott law have been established using the I–V characteristics and the change in the carrier type upon temperature and concentration variations has been observed. The effect of the sample prehistory on the conductivity, impedance, and magnetic susceptibility under the action of a magnetic field in a wide temperature range has been found. The trivalent state of ytterbium ions has been determined using the electron paramagnetic resonance study. The dynamic JT transitions temperature are found by IR method and by the electron paramagnetic resonance. Anomalies of carrier mobility and magneto-impedance were found in the vicinity of the Jahn-Teller transitions. The experimental data are explained by the localization of electrons with the formation of the interstitial orbital momenta and an orbital momentum into the site. The sample prehistory is related to the lifting of the orbital angular moments degeneracy and the direction of the axis of distortion of the octahedrons in a magnetic field.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Golovnev N. N., Gerasimova M. A., Molokeev M. S., Plyaskin M. E., Baronin M. E.
Заглавие : Photoluminescence of pefloxacindi-ium manganese(II) and zinc(II) tetrahalides
Место публикации : J. Mol. Struct. - 2022. - Vol. 1248. - Ст.131468. - ISSN 00222860 (ISSN), DOI 10.1016/j.molstruc.2021.131468
Примечания : Cited References: 42. - The research was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20-43-240007. Authors thank the Centre for Equipment Joint User of School of Petroleum and Natural Gas Engineering of Siberian Federal University, Institute of Chemistry and Chemical Technology SB RAS for their technical support
Аннотация: Mn2+-based hybrid materials have become the hotspot of current research studies owing to their high photoluminescence quantum yield (PLQY), low-cost, environmental friendliness and stability. For the first time, we report the hydrothermal synthesis of two lead-free zero-dimensional luminescent organic-inorganic hybrid compounds, PefH2[MnBr4] (1) and PefH2[MnCl4] (2) (Pef = pefloxacin). They were characterized by elemental analysis, TG-DSC, single-crystal and powder XRD. Compounds 1–2 exhibit a distorted tetrahedral geometry around the manganese(II) metal center, which is isolated from the same centers by bulky pefloxacindi-ium (PefH22+) ions with a Mn···Mn distance of 7.3 Å. Their structures are stabilized by N—H···O, O—H···X (X = Br, Cl), C—H···O and C—H···X hydrogen bands and π–π stacking interaction. Thermal decomposition starts at T › 230°С for 1 and T › 210°С for 2 and proceeds for several stages. Upon UV excitation compounds exhibit a bright green emission with a moderate PLQY of 45% for 1 and 30% for 2. The influence of the halide ion and metal ion on the photoluminescence properties of isostructural compounds PefH2[MX4] (M = Mn, Zn and X = Br, Cl) is discussed.
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10.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Романова, Оксана Борисовна, Аплеснин, Сергей Степанович, Удод, Любовь Викторовна
Заглавие : Кинетические эффекты в сульфидах марганца замещенных тулием и иттербием
Коллективы : "Новое в магнетизме и магнитных материалах", международная конференция, Научный совет по физике конденсированных сред РАН, МИРЭА - Российский технологический университет, Московский государственный университет им. М.В. Ломоносова, Магнитное общество России
Место публикации : Новое в магнетизме и магнитных материалах: сборник трудов XXIV международной конференции/ прогр. ком.: Р. С. Исхаков, С. Г. Овчинников. - 2021. - Секция 7: Кинетические эффекты в магнетиках. - С. 17-20
Примечания : Библиогр.: 9. - Исследование выполнено при финансовой поддержке РФФИ и БРФФИ в рамках научного проекта No 20-52-00005
Аннотация: Данная работа посвящена изучению кинетических эффектов в сульфидах марганца допированных элементами с переменной валентностью (Yb и Tm с Х≤0.05) измеренных в диапазоне температур (77-400 K) и магнитных полей до 12 кЭ. Из ВАХ определены механизмы проводимости, для системы Yb0.05Mn0.99S преобладает Пула– Френкеля, а для Tm0.01Mn0.99S описывается законом Ома. Обнаружен эффект магнитосопротивления в этих системах. Наблюдаются аномалии на температурной зависимости термоЭДС.This work is to the study of kinetic effects in manganese sulfides doped with elements with variable valence (Yb and Tm with X≤0.05) measured in the temperature range (77-400 K) and magnetic fields up to 12 kOe. The conduction mechanisms are determined by I – V characteristics: for the Yb0.05Mn0.99S is Poole – Frenkel, and for Tm0.01Mn0.99S it is described by Ohm's law. The effect of magnetoresistance is found in these systems. Anomalies are observed in the temperature dependence of the thermoEMF.
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