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Peculiarities of the transport and magnetic properties of the cation substituted manganese sulphides / Romanova O.B., Ryabinkina L.I. // Ninth International workshop on Non–Crystalline solids, Porto 2008, p. 60

Доп.точки доступа:
Romanova, O. B.; Романова, Оксана Борисовна; Ryabinkina, L. I.; Рябинкина, Людмила Ивановна
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Luminescence of manganese ions in yttrium aluminium borate / Aleksandrovsky A.S., Gudim I.A., Krylov A.S, Temerov V.E. // 15th International Conference on Luminescence and Optical Spectroscopy of Condensed Matter, Lyon, 2008, p.482

Доп.точки доступа:
Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Gudim, I. A.; Гудим, Ирина, Анатольевна; Krylov, A. S; Temerov, V. E.
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Aplesnin, S. S.
Regulation of the thermopower and ultrasound by magnetic field in manganese sulfide doped with variable-valence ions / S. Aplesnin, A. Kharkov, M. Sitnikov // Eur. Phys. J. Plus. - 2024. - Vol. 139, Is. 3. - Ст. 247, DOI 10.1140/epjp/s13360-024-05032-2. - Cited References: 50. - The study was supported by a grant from the Russian Science Foundation N 23-22-10016, the Krasnoyarsk Regional Science Foundation. The investigation of microstructural properties of the samples was carried out using equipment’s (SEM and TEM) the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center «Krasnoyarsk Science Center SB RAS». The authors are grateful to A.V. Shabanov for the scanning electron microscopy investigations . - ISSN 2190-5444
Аннотация: The effect of cation nonstoichiometry and variable-valence samarium ions on the thermoelectric and structural characteristics of manganese sulfide is studed. Nonstoichiometry leads to a change in the thermopower sign in the antiferromagnetic region in a magnetic field and a decrease in the thermopower in the paramagnetic region. It is shown that the thermopower and Nernst–Ettingshausen coefficient of samarium-substituted manganese sulfide change their signs in the vicinity of structural and electronic transitions established from the thermal expansion coefficient. A decrease in the sound attenuation in a magnetic field is found. A correlation between the temperatures of the change of the sign of the Nernst–Ettingshausen effect and the change in electrosound in a magnetic field is established and explained within the model of carrier diffusion in the phase transition region. The conductivity control by the ultrasound is demonstrated.

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Держатели документа:
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russia

Доп.точки доступа:
Kharkov, A.; Sitnikov, M.; Аплеснин, Сергей Степанович
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Kondo effects in variable-valence manganese-substituted thulium selenide / O. B. Romanova, S. S. Aplesnin, M. N. Sitnikov [et al.] // Ceram. Int. - 2024, DOI 10.1016/j.ceramint.2024.06.171. - Cited References: 31 . - Article in press. - ISSN 0272-8842. - ISSN 1873-3956
Кл.слова (ненормированные):
Impedance -- Magnetic properties -- Thermopower -- Kondo effect
Аннотация: The MnXTm1‒XSe (0 ≤ Х ≤ 0.2) solid solutions have been first synthesized and their structural, magnetic, and transport properties have been studied in the temperature range of 80–1000 K and magnetic fields of up to 12 kOe. The surface morphology of the samples has been examined and the chemical analysis has been carried out. It is shown that the valence change with the increasing substitution concentration is accompanied by a change in the lattice parameter and a decrease in the magnetic moment of the samples. The Kondo temperatures caused by the manganese and thulium subsystem have been found in the low- and room-temperature regions. The temperature of localization of small-radius polarons has been determined. A drastic decrease in the relaxation time in the range of the manganese ion percolation through the lattice in the MnXTm1‒XSe system has been established. The change of the current carrier type upon variation in the temperature and substitution concentration was determined from the Seebeck coefficient. A high-temperature extremum of thermopower was revealed, which is explained within the framework of the Anderson model.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russia
Scientific-Practical Materials Research Center NAS, Minsk, Belarus

Доп.точки доступа:
Romanova, O. B.; Романова, Оксана Борисовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Sitnikov, M.N.; Udod, L. V.; Удод, Любовь Викторовна; Shabanov, A. V.; Шабанов, Александр Васильевич; Goncharov, V.S.; Zhivulko, A.M.; Yanushkevich, K.I.
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Near-unity PLQY and high anti-thermal quenching red luminescence from one-dimensional hybrid manganese chloride for efficient and stable white light-emitting diodes / B. Su, M. S. Molokeev, R. Chen, T. Zhang // J. Mater. Chem. C. - 2024, DOI 10.1039/D4TC01477D. - Cited References: 46 . - Article in press. - ISSN 2050-7526. - ISSN 2050-7534
Аннотация: The discovery of novel Mn2+-based metal halides with excellent luminescence properties and thermostability is particularly of great importance for solid-state lighting (SSL). Herein, a novel one-dimensional hybrid manganese chloride (TMA)MnCl3 of a hexagonal system with a P63/m space group is synthesized via a simple saturation crystallization method. Under 443 nm excitation, (TMA)MnCl3 single crystals exhibit a strong broad-band red emission peak at 645 nm originating from the 4T1 → 6A1 transition of Mn2+ ions with a full width at half maximum of 99 nm and a photoluminescence quantum yield (PLQY) of 98.6%. Moreover, (TMA)MnCl3 shows a high anti-thermal quenching behavior, and the integrated PL intensity still retains 100% of the initial intensity measured at 300 °C, caused by the high structural rigidity. Benefiting from its strong blue light excitation, high PLQY, and excellent thermal stability, a stable white light-emitting diode device is fabricated by combining a 465 nm blue LED chip, green-emitting Lu3Al5O12:Ce3+ and the (TMA)MnCl3 red phosphor with a high color rendering index of 94.3% and a correlated color temperature of 3995 K. This work develops a novel hybrid manganese chloride red-emitter and paves a new path to explore high-performance phosphors excited by blue light for SSL.

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Держатели документа:
School of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi, P. R. China
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Department of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk 660041, Russia
Research and Development Department, Kemerovo State University, Kemerovo, Russia

Доп.точки доступа:
Su, B.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Chen, R.; Zhang, T.
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    Two organic-inorganic manganese(II) halide hybrids containing protonated N,N’-dialkylthioureas with efficient green-emission / N. N. Golovnev, M. A. Gerasimova, I. A. Ostapenko [et al.] // J. Mol. Struct. - 2023. - Vol. 1277. - Ст. 134851, DOI 10.1016/j.molstruc.2022.134851. - Cited References: 42. - The reported study was funded by RFBR according to the research project № 19-52-80003. X-ray data from single crystals and powders were obtained with the analytical equipment of Krasnoyarsk Center of collective use of SB RAS . - ISSN 0022-2860
   Перевод заглавия: Два металорганических галогенида марганца(II), содержащие протонированные N,N'-диалкилтиомочевины с эффективным зеленым излучением
Кл.слова (ненормированные):
Zero-dimensional hybrid manganese(II) halides -- N,N′-alkylthioureas -- Synthesis -- Structure -- Photoluminescence -- Quantum yield -- X-ray diffraction
Аннотация: Luminescent (C5H13N2S)2[MnBr4] (1) and (C7H17N2S)2[MnBr4] (2) (C5H12N2S = N,N′-diethylthiourea, C7H16N2S = N,N′-diisopropylthiourea) were prepared via solvothermal method, and the structures of these compounds have been resolved using X-ray single crystal diffraction. The structures consist of electrostatically bound MnBr42− anions and organic C5H13N2S+ and C7H17N2S+ cations. The intermolecular N−H···Br and N−H···S hydrogen bonds additionally stabilize crystal structures of 1-2. Upon excitation over broadband covering the range 265 to 515 nm, these compounds show green emission peaking at 526 nm for 1 and 522 nm for 2, which is assigned to the 4T1→ 6A1 electronic transition of Mn2+ from isolated within the crystal structures MnBr42− tetrahedra. The photoluminescence quantum yield (PLQY) of powder 1 is 97 ± 7% for excitation at 440 nm and that of powder 2 is 83 ± 7% for excitation at 365 nm. The high PLQY indicates the absence of noticeable concentration quenching at shortest Mn···Mn distance of 8.11 and 8.73 Å between Mn2+ ions within the structures of 1 and 2. The high-performance photoluminescence of 0D (C5H13N2S)2[MnBr4] and (C7H17N2S)2[MnBr4] compounds demonstrated promising applications in photonics.

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Держатели документа:
Siberian Federal University, Krasnoyarsk 660041, Russia
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russia

Доп.точки доступа:
Golovnev, Nicolay N.; Gerasimova, Marina A.; Ostapenko, Ivan A.; Zolotov, Andrey O.; Molokeev, M. S.; Молокеев, Максим Сергеевич
}
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Manganese luminescent centers of different valence in yttrium aluminum borate crystals / A. Molchanova, K. Boldyrev, N. Kuzmin [et al.] // Materials. - 2023. - Vol. 16, Is. 2. - Ст. 537, DOI 10.3390/ma16020537. - Cited References: 49. - This work was supported in part by the Russian Science Foundation under Grant No. 21-72-00134. K.B. and M.P. acknowledge financial support from the Ministry of Science and Higher Education of Russia under Grant 0039-2019-0004 . - ISSN 1996-1944
Кл.слова (ненормированные):
manganese -- YAl3(BO3)4:Mn crystal -- XANES spectroscopy -- high-resolution optical spectroscopy -- photoluminescence
Аннотация: We present an extensive study of the luminescence characteristics of Mn impurity ions in a YAl3(BO3)4:Mn crystal, in combination with X-ray fluorescence analysis and determination of the valence state of Mn by XANES (X-ray absorption near-edge structure) spectroscopy. The valences of manganese Mn2+(d5) and Mn3+(d4) were determined by the XANES and high-resolution optical spectroscopy methods shown to be complementary. We observe the R1 and R2 luminescence and absorption lines characteristic of the 2E ↔ 4A2 transitions in d3 ions (such as Mn4+ and Cr3+) and show that they arise due to uncontrolled admixture of Cr3+ ions. A broad luminescent band in the green part of the spectrum is attributed to transitions in Mn2+. Narrow zero-phonon infrared luminescence lines near 1060 nm (9400 cm−1) and 760 nm (13,160 cm−1) are associated with spin-forbidden transitions in Mn3+: 1T2 → 3T1 (between excited triplets) and 1T2 → 5E (to the ground state). Spin-allowed 5T2 → 5E Mn3+ transitions show up as a broad band in the orange region of the spectrum. Using the data of optical spectroscopy and Tanabe–Sugano diagrams we estimated the crystal-field parameter Dq and Racah parameter B for Mn3+ in YAB:Mn as Dq = 1785 cm−1 and B = 800 cm−1. Our work can serve as a basis for further study of YAB:Mn for the purposes of luminescent thermometry, as well as other applications.

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Держатели документа:
Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, 108840 Moscow, Russia
Landau Phystech School of Physics and Research, Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
Faculty of Geology, Lomonosov Moscow State University, 119991 Moscow, Russia
National Research Center “Kurchatov Institute”, 123182 Moscow, Russia
Federal Scientific Research Center “Crystallography and Photonics”, Russian Academy of Sciences, 119333 Moscow, Russia
Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Akademgorodok, 660036 Krasnoyarsk, Russia
Branch “Aprelevka Department of VNIGNI”, Federal State Budgetary Institution “All-Russian Research Geological Oil Institute”, 143360 Aprelevka, Russia

Доп.точки доступа:
Molchanova, Anastasiia; Boldyrev, Kirill; Kuzmin, Nikolai; Veligzhanin, Alexey; Khaydukov, Kirill; Khaydukov, Evgeniy; Kondratev, Oleg; Gudim, I. A.; Гудим, Ирина Анатольевна; Mikliaeva, Elizaveta; Popova, Marina
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Possible noncollinear magnetism and different valence state of manganese ions in quasi-low-dimensional ludwigites of (Ni,Cu,Mn)3BO5 / S. N. Sofronova, A. Veligzhanin, E. Eremin [et al.] // Phys. Status Solidi B. - 2023. - Vol. 260, Is. 5. - Ст. 2200457, DOI 10.1002/pssb.202200457. - Cited References: 30. - The equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS” was used for measurements in this research. The authors thank E. Moshkina for providing the samples for the study. - Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activity. Grant Number: 20-42-240011 . - ISSN 0370-1972. - ISSN 1521-3951
Кл.слова (ненормированные):
exchange interactions -- ferrimagnetism -- ludwigites -- noncollinear magnetism
Аннотация: The content of transition-metal ions and their valence state for three compositions of NixCuyMn3−x−yBO5 are estimated by the methods of X-ray absorption spectroscopy. In all the three compositions, the copper content does not exceed 0.25. One of the compositions has manganese ions both in the trivalent and bivalent states according to the K-edge position. The calculations of the total energies of various cation-ordered structures using the software package Wien2K show that copper ions predominately occupy one site, namely, 2(2d). The measurements of the magnetic properties show two types of magnetic transitions in all the three compositions, with one of them being in the range of 60–75 K and the other one at 10 K. Based on the exchange interactions calculated in the framework of the empirical model, magnetic ordering temperatures are estimated for two- and three-sublattice structures and the magnetic transition in the range of 60–75 K is supposed to be connected with magnetic moment ordering in sites 2 and 3.

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Держатели документа:
Kirensky Institute of Physics Federal Research Center KSC SB RAS 660036 Krasnoyarsk, Russia
Kurchatov Specialized Source of Synchrotron Radiation “KISI-Kurchatov” National Research Centre “Kurchatov Institute” 123182 Moscow, Russia

Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Veligzhanin, Aleksey; Eremin, E. V.; Еремин, Евгений Владимирович; Chernyshev, A. V.; Чернышов, Артем Валерьевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич
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Kinetic effects in thulium manganese selenides / O. B. Romanova, S. S. Aplesnin, L. V. Udod [et al.] // X International scientific conference “Actual problems of solid state physics" : Book of abstracts / int. sci. com. S. S. Aplesnin [et al]. - Minsk, 2023. - Sect.: Functional materials and applications. - P. 154. - Cited References: 1 . - ISBN 978-985-7299-65-2

Материалы конференции
Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS
Reshetnev Siberian State University of Science and Technology
Scientific-Practical Materials Research Center NAS, Minsk

Доп.точки доступа:
Aplesnin, S. S. \int. sci. com.\; Аплеснин, Сергей Степанович; Romanova, O. B.; Романова, Оксана Борисовна; Aplesnin, S. S.; Udod, L. V.; Удод, Любовь Викторовна; Galyas, A. I.; Zhivulko, A. M.; Yanushkevich, K. I.; "Actual problems of solid state physics", International scientific conference(10 ; 2023 ; May 22-26 ; Minsk); "Актуальные проблемы физики твердого тела", международная научная конференция(10 ; 2023 ; 22-26 мая ; Минск); Научно-практический центр по материаловедению НАН Беларуси
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10.

Ferromagnetic silicides and germanides epitaxial films and multilayered hybrid structures: Synthesis, magnetic and transport properties / A. S. Tarasov, A. V. Lukyanenko, I. A. Yakovlev [et al.] // Bull. Russ. Acad. Sci.: Phys. - 2023. - Vol. 87, Suppl. 1. - P. S133-S146, DOI 10.1134/S1062873823704518. - Cited References: 54. - The authors thank the laboratory of Magnetic MAX Materials created under Megagrant project (agreement no. 075-15-2019-1886) for providing experimental equipment and the Collective Use Center at the Krasnoyarsk Scientific Center (Siberian Branch, Russian Academy of Sciences) for assistance. The authors also thank Professor B.A. Belyaev for FMR calculations. - Supported by the Russian Science Foundation, grant no. 23-22-10033, https://rscf.ru/project/23-22-10033/, Krasnoyarsk Regional Fund of Science . - ISSN 1062-8738. - ISSN 1934-9432
Кл.слова (ненормированные):
iron silicide -- manganese germanide -- MBE -- FMR -- electronic transport -- spintronics
Аннотация: Planar and vertical hybrid structures, which combine ferromagnetic and semiconductor layers are essential for implementation and study of spin transport phenomena in semiconductors, which is crucial for the advancement and development of spintronics. We have developed approaches for the synthesis of Fe3 + xSi1 – x epitaxial thin films and demonstrated the spin accumulation effect in multiterminal devices based on Fe3 + xSi1 – x/Si. Fe3 + xSi1 – x/Ge/Fe3Si and Fe3 + xSi1 – x/Ge/Mn5Ge3 multilayer hybrid structures were synthesized on a Si(111) substrate, study of their structural, magnetic and transport properties were performed. The effect of synthesis conditions on the growth of epitaxial structures and on their magnetic and transport properties was discussed. The results obtained may prove valuable in the development and fabrication of spintronic devices.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center”, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, 660041, Krasnoyarsk, Russia
Federal Research Center “Krasnoyarsk Scientific Center”, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Tarasov, A. S.; Тарасов, Антон Сергеевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Yakovlev, I. A.; Яковлев, Иван Александрович; Tarasov, I. A.; Тарасов, Иван Анатольевич; Bondarev, I. A.; Бондарев, Илья Александрович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Shanidze, L. V.; Шанидзе, Лев Викторович; Smolyakov, D. A.; Смоляков, Дмитрий Александрович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Volkov, N. V.; Волков, Никита Валентинович
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11.

Magnetoimpedance in manganese sulfide substituted with lutetium / M. N. Sitnikov, S. S. Aplesnin, A. M. Kharkov [et al.] // Phys. Solid State. - 2023. - Vol. 65, Is. 2. - P. 211-217, DOI 10.21883/PSS.2023.02.55402.527. - Cited References: 28. - This study was supported by a grant of the President of the Russian Federation No. MK-620.2021.1.2 . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
Semiconductors -- impedance -- magnetoimpedance -- attenuation of ultrasound
Аннотация: The components of the impedance, the impedance of the LuxMn1–xS (x ˃ 0.2) solid solution in the temperature range of 80-500 K and the frequency of 100-106 Hz were studied. A change in the sign of the magnetoimpedance in concentration and temperature is found. The contribution of the reactive and active components to the magnetoimpedance is determined. The correlation of magnetoimpedance temperatures with the temperatures of the maximum attenuation of ultrasound and electrosound has been established. The frequency dependences of the reactive part of the impedance are described in the Cole-Cole model.

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Публикация на русском языке Магнитоимпеданс в сульфиде марганца, замещенного лютецием [Текст] / М. Н. Ситников, С. С. Аплеснин, А. М. Харьков [и др.] // Физ. тверд. тела. - 2023. - Т. 65 Вып. 2. - С. 219-225

Держатели документа:
Siberian State University of Science and Technology, Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia

Доп.точки доступа:
Sitnikov, M. N.; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Kharkov, A. M.; Abdelbaki, H.; Zelenov, F. V.
}
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12.

Magnetic transitions and different valence states of manganese ions in solid solutions (Ni,Cu,Mn)3BO5 / S. N. Sofronova, E. V. Eremin, A. A. Veligzhanin [et al.] // Phys. Solid State. - 2023. - Vol. 65, Is. 2. - P. 260-269, DOI 10.21883/PSS.2023.02.55410.512. - Cited References: 22. - The study was done with financial support from the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory and the Krasnoyarsk Regional Fund of Science within scientific project No. 20-42-240011 . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
ludwigites -- magnetic phase transition -- indirect exchange interactions
Аннотация: The content of metal ions and their valence state for three NixCuyMn3–x–yBO5 compositions were estimated by EXAFS and XANES spectroscopy methods. In all three compositions, the copper y content did not exceed 0.25; in the third composition, some manganese ions entered the compound not only in the trivalent, but also in the divalent state. A detailed study of the magnetic properties showed that two magnetic transitions are observed in all compositions: one in the region of 60–75 K, and the second in the region of 10 K. Based on the exchange interactions calculated within the framework of the empirical model, the magnetic ordering temperatures for two- and three-lattice magnets were determined and it was assumed that the magnetic transition in the region of 60–75 K is associated with the ordering of magnetic moments in positions 2 and 3.

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Публикация на русском языке Магнитные переходы и разные валентные состояния ионов марганца в твердых растворах (Ni,Cu,Mn)3BO5 [Текст] / С. Н. Софронова, Е. В. Еремин, А. А. Велигжанин [и др.] // Физ. тверд. тела. - 2023. - Т. 65 Вып. 2. - С. 268-277

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
National Research Center “Kurchatov Institute”, Moscow, Russia

Доп.точки доступа:
Sofronova, S. N.; Софронова, Светлана Николаевна; Eremin, E. V.; Еремин, Евгений Владимирович; Veligzhanin, A. A.; Chernyshov, A. V.; Чернышов, Артем Валерьевич; Kartashev, A. V.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич
}
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13.

Multicomponent flux growth and composition control of Cu2MnBO5:Ga ludwigites / E. Moshkina, A. Krylov, D. Kokh [et al.] // CrystEngComm. - 2022. - Vol. 24, Is. 19. - P. 3565-3575, DOI 10.1039/d2ce00258b. - Cited References: 26. - This study was supported by the Russian Science Foundation (Grant No. 21-72-00130). The Raman, X-ray, and EDX data were obtained using the analytical equipment of the Krasnoyarsk Regional Center of Research Equipment of the Federal Research Center “Krasnoyarsk Science Center SB RAS” . - ISSN 1466-8033
Кл.слова (ненормированные):
Bismuth compounds -- Boron compounds -- Copper compounds -- Crystal symmetry -- Energy dispersive spectroscopy -- Gallium -- Manganese oxide -- Positive ions -- Sodium compounds
Аннотация: To reach the concentration phase boundary between antiferromagnetic Cu2GaBO5 and ferrimagnetic Cu2MnBO5 ludwigites, solid solutions Cu2Mn1−xGaxBO5 (x = 0.05, 0.1, 0.15, 0.175) were grown by the flux technique using a multi-component solvent based on Bi2Mo3O12 with the addition of Na2B4O7 which significantly influenced the crystal formation and cation composition of the studied compounds. The content of the flux system was corrected taking into account the earlier established relationship of the partition coefficients of Mn2O3 and Ga2O3. The influence of the solvent components on the ludwigite crystallization was analyzed. The maximum size of the grown crystal was 1 × 1 × 4 mm3. The structure and cation composition of the grown compounds were studied using X-ray (X-ray diffraction, EDX (energy-dispersive X-ray spectroscopy)) and vibrational (Raman) spectroscopy techniques. The phase boundary of Cu2MnBO5–Cu2GaBO5 was found to be in the concentration range of x = 0.15–0.175, corresponding to a change in the monoclinic axis direction and a leap in the lattice parameters. The symmetry evolution of metal–oxygen octahedra for four nonequivalent cation positions was analyzed, and the unique crystal structure of Cu2MnBO5 demonstrated high rigidity relative to the introduction of Ga3+ cations. The polarized Raman spectra of monoclinic ludwigites were obtained and studied for the first time. A comparison of the spectra of the studied samples in both phases and orthorhombic ludwigites was made. A number of spectral features due to the monoclinic distortions in the crystal were found. In agreement with the Raman experiment, the concentration phase boundary was close to 0.15.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian State University of Science and Technologies, Krasnoyarsk, 660037, Russian Federation
Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
St Petersburg University, St Petersburg, 199034, Russian Federation

Доп.точки доступа:
Moshkina, E. M.; Мошкина, Евгения Михайловна; Krylov, A. S.; Крылов, Александр Сергеевич; Kokh, D.; Shabanova, K.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Bovina, A. F.; Бовина, Ася Федоровна; Plyaskin, M.; Пляскин, Михаил Е.; Rostovtsev, N.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
}
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14.

Structural and electronic transitions in thulium-substituted manganese selenide / O. B. Romanova, S. S. Aplesnin, M. N. Sitnikov [et al.] // Ceram. Int. - 2022. - Vol. 48, Is. 20. - P. 29822-29828, DOI 10.1016/j.ceramint.2022.06.244. - Cited References: 40. - This work has been supported by the grants the Russian Science Foundation, RSF 23-42-10002 and F23RSF-055. The morphology of the samples TmXMn1‒XSe (0 ≤ Х ≤ 0.2) was examined using equipment's (SEM) the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center «Krasnoyarsk Science Center SB RAS» . - ISSN 0272-8842
Кл.слова (ненормированные):
Electrical properties -- Thermal expansion -- Acoustic properties -- Spectroscopy
Аннотация: The structural, transport, optical, and acoustic properties of a new TmXMn1‒XSe (0 ≤ Х ≤ 0.2) chalcogenide system have been studied in the temperature range of 80–500 K. The morphology and microstructure of the polycrystalline samples have been studied by scanning electron microscopy. Temperatures of maxima of the thermal expansion and sound attenuation coefficients related to the lattice strain and electronic transitions have been determined. The variation in the energy of activation of carriers near the percolation concentration caused by a change in the thulium valence has been revealed. The type of majority carriers has been established from the thermopower data. The temperature range of the anomalous compressibility associated with delocalization of electrons has been found from the temperature dependence of the thermal expansion coefficient. Jahn‒Teller polarons have been found above the percolation concentration using the infrared spectroscopy data.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russian Federation
Scientific-Practical Materials Research Center NAS, Minsk, Belarus

Доп.точки доступа:
Romanova, O. B.; Романова, Оксана Борисовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Sitnikov, M. N.; Udod, L. V.; Удод, Любовь Викторовна; Shabanov, A. V.; Шабанов, Александр Васильевич; Yanushkevich, K. I.; Galyas, A. I.; Zhivulko, A. M.
}
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15.

    Photoluminescence of pefloxacindi-ium manganese(II) and zinc(II) tetrahalides / N. N. Golovnev, M. A. Gerasimova, M. S. Molokeev [et al.] // J. Mol. Struct. - 2022. - Vol. 1248. - Ст. 131468, DOI 10.1016/j.molstruc.2021.131468. - 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 . - ISSN 0022-2860
   Перевод заглавия: Фотолюминесценция тетрагалогенидов марганца(II) и цинка(II) пефлоксацина
Кл.слова (ненормированные):
Manganese and zinc halides -- Pefloxacin -- Ionic compounds -- Photoluminescence -- X-ray diffraction -- Thermal decomposition
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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Держатели документа:
Siberian Federal University, 79 Svobodny Prospect, Krasnoyarsk, 660041, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, bld. 38 Akademgorodok 50, Krasnoyarsk, 660036, Russian Federation
Department of Physics, Far Eastern State Transport University, 47 Seryshev Str., Khabarovsk, 680021, Russian Federation
Research and Development Department, Kemerovo State University, 6 Krasnaya Str., Kemerovo, 650000, Russian Federation

Доп.точки доступа:
Golovnev, N. N.; Gerasimova, M. A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Plyaskin, M. E.; Baronin, M. E.
}
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16.

    Magnetoresistance and magnetoimpedance in holmium manganese sulfides / O. B. Romanova, S. S. Aplesnin, M. N. Sitnikov [et al.] // Appl. Phys. A. - 2022. - Vol. 128, Is. 2. - Ст. 124, DOI 10.1007/s00339-021-05198-x. - Cited References: 46. - Funding was provided by Russian Foundation for Fundamental Investigations (20-42-243002) . - ISSN 0947-8396. - ISSN 1432-0630
   Перевод заглавия: Магнитосопротивление и магнитоимпеданс в гольмиевом сульфиде марганца

РУБ Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
PHASE-SEPARATION
IMPEDANCE
Кл.слова (ненормированные):
Sulfides -- I-V characteristics -- Electrical polarization -- Magnetoresistance -- Magnetoimpedance
Аннотация: The structure, transport characteristics, real and imaginary parts of the impedance components and electric polarization of the HoXMn1-XS (X = 0.1 and 0.2) system have been investigated in the temperature range of 80-500 K in magnetic fields of up to 12 kOe. The morphology of synthesized samples has been studied. The influence of the magnetic field on the transport characteristics, on both direct and alternating currents of holmium manganese sulfides, have been established. The negative effects of DC magnetoresistance in the region of the magnetic phase transition and positive AC magnetoimpedance up to 4% in the paramagnetic region have been established. The critical temperatures of the existence of the electric polarization have been determined. At a substitution concentration of X = 0.1, the activation character of the relaxation time versus temperature has been found. The diffusion contribution for the composition with X = 0.2 has been established by the impedance hodograph.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660014, Russia.

Доп.точки доступа:
Romanova, O. B.; Романова, Оксана Борисовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Sitnikov, M. N.; Udod, L. V.; Удод, Любовь Викторовна; Kharkov, A. M.; Russian Foundation for Fundamental InvestigationsRussian Foundation for Basic Research (RFBR) [20-42-243002]
}
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17.

Chemistry of vinylidene complexes—XXVII—new µ-vinylidene MnPt complexes with platinum-coordinated 1-adamantyl isocyanide ligand: spectroscopic, structural and electrochemical study / V. V. Verpekin, O. S. Chudin, A. A. Kondrasenko [et al.] // Transition Met. Chem. - 2022. - Vol. 47. Is. 7-8. - P. 283-292, DOI 10.1007/s11243-022-00511-w. - Cited References: 46. - This work was conducted within the framework of the budget project 0287–2021-0012 for Institute of Chemistry and Chemical Technology SB RAS . - ISSN 0340-4285
Кл.слова (ненормированные):
Binary alloys -- Cyanides -- Ligands -- Manganese alloys -- Nuclear magnetic resonance spectroscopy -- Platinum compounds -- Redox reactions -- Chemical oxidation -- Electrochemical studies -- Isocyanide ligands -- Redox property -- Spectroscopic studies -- Structural studies -- Vinylidene complexes -- X-ray diffraction studies -- Platinum alloys
Аннотация: New binuclear MnPt µ-vinylidene complexes Cp(CO)2Mn(µ-C=CHPh)Pt(CN–Ad)(L) [L=PPh3 (1a), P(OPri)3 (2a)] bearing a terminal platinum-coordinated 1-adamantyl isocyanide ligand were prepared by the treatment of Cp(CO)2Mn(µ-C=CHPh)Pt(CO)(L) [L=PPh3 (1b), P(OPri)3 (2b)] with CN-Ad. At the same time the reaction between Cp(CO)2Mn(µ-C=CHPh)Pt(L)2 [L=PPh3 (1c), P(OPri)3 (2c)] and CN-Ad did not proceed. The new complexes were characterized by IR and 1H, 13C, 31P NMR spectroscopy. The molecular structure of Cp(CO)2Mn(µ-C=CHPh)Pt(CN–Ad)[P(OPri)3] (2a) was determined by an X-ray diffraction study. The redox properties of the new complexes and their reactions of chemical oxidation were studied. An influence of the platinum-coordinated 1-adamantyl isocyanide ligand on the properties of the synthesized µ-vinylidene compounds 1a and 2a was revealed.

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Держатели документа:
Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Akademgorodok, 50-24, Krasnoyarsk, 660036, Russian Federation
Institute of Physics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Akademgorodok, 50-38, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodny Prospect, 79, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Verpekin, V. V.; Chudin, O. S.; Kondrasenko, A. A.; Burmakina, G. V.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Zimonin, D. V.; Rubaylo, A. I.
}
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18.

Concentration dependences of the structural, magnetic and kinetic properties of manganese chalcogenides doped with tellurium / O. B. Romanova, M. N. Sitnikov, Yu. Yu. Loginov, H. Abdelbaki // IOP Conf. Ser.: Mater. Sci. Eng. - 2022. - Vol. 1230. - Ст. 012016, DOI 10.1088/1757-899X/1230/1/012016. - Cited References: 26. - The reported study was funded by RFBR according to the research project No 20-52-00005 Bel_a . - ISSN 1757-8981. - ISSN 1757-899X
Аннотация: The effect of anionic substitution on the structural, magnetic, and kinetic properties of chalcogenides of the MnSe1-XTeX system in the temperature range of 77-400K in magnetic fields up to 12 kOe was studied. With an increase in the substitution concentration, changes in the structural and magnetic characteristics, which correlate with changes in the electronic structure, were found. The type and mobility of the main current carriers were determined from the Hall effect measurements.

https://doi.org/10.1088/1757-899X/1230/1/012016
Держатели документа:
Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarskii rabochii prospekt, Krasnoyarsk, 660037, Russia
Kirensky Institute of Physics SB RAS, 50/38 Akademgorodok St., Krasnoyarsk, 660036, Russia

Доп.точки доступа:
Romanova, O. B.; Романова, Оксана Борисовна; Sitnikov, M. N.; Loginov, Yu. Yu.; Abdelbaki, H.; Reshetnev Readings 2019(11-15 November 2019 ; Krasnoyarsk, Russian Federation)
}
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19.

Sublayer-enhanced growth of highly ordered Mn5Ge3 thin film on Si(111) / I. Yakovlev, I. Tarasov, A. Lukyanenko [et al.] // Nanomaterials. - 2022. - Vol. 12, Is. 24. - Ст. 4365, DOI 10.3390/nano12244365. - Cited References: 23. - The research was funded by Russian Science Foundation, project No. 21-12-00226. The RBS experiment was conducted in REC «Functional Nanomaterials», Immanuel Kant Baltic Federal University under the financial support from the Ministry of Science and Higher Education of the Russian Federation (project FZWN-2020-0008) . - ISSN 2079-4991
Кл.слова (ненормированные):
manganese germanide -- thin film -- MBE -- ferromagnetism -- sublayer
Аннотация: Mn5Ge3 epitaxial thin films previously grown mainly on Ge substrate have been synthesized on Si(111) using the co-deposition of Mn and Ge at a temperature of 390 °C. RMS roughness decreases by almost a factor of two in the transition from a completely polycrystalline to a highly ordered growth mode. This mode has been stabilized by changing the ratio of the Mn and Ge evaporation rate from the stoichiometric in the buffer layer. Highly ordered Mn5Ge3 film has two azimuthal crystallite orientations, namely Mn5Ge3 (001) [1-10] and Mn5Ge3 (001) [010] matching Si(111)[-110]. Lattice parameters derived a (7.112(1) Å) and c (5.027(1) Å) are close to the bulk values. Considering all structural data, we proposed a double buffer layer model suggesting that all layers have identical crystal structure with P6₃/mcm symmetry similar to Mn5Ge3, but orientation and level of Si concentration are different, which eliminates 8% lattice mismatch between Si and Mn5Ge3 film. Mn5Ge3 film on Si(111) demonstrates no difference in magnetic properties compared to other reported films. TC is about 300 K, which implies no significant excess of Mn or Si doping. It means that the buffer layer not only serves as a platform for the growth of the relaxed Mn5Ge3 film, but is also a good diffusion barrier.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, 660041 Krasnoyarsk, Russia
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia
Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, 660036 Krasnoyarsk, Russia
REC «Functional Nanomaterials», Immanuel Kant Baltic Federal University, 236016 Kaliningrad, Russia

Доп.точки доступа:
Yakovlev, I. A.; Яковлев, Иван Александрович; Tarasov, I. A.; Тарасов, Иван Анатольевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Solovyov, L.; Sukhachev, A. L.; Сухачев, Александр Леонидович; Volochaev, M. N.; Волочаев, Михаил Николаевич; Efimov, D.; Goikhman, A.; Bondarev, I. A.; Бондарев, Илья Александрович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Volkov, N. V.; Волков, Никита Валентинович; Tarasov, A. S.; Тарасов, Антон Сергеевич
}
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20.

Structural, magnetic and transport properties thulium-substituted manganese selenide / O. B. Romanova, S. S. Aplesnin, L. V. Udod [et al.] // VIII Euro-Asian symposium "Trends in magnetism" (EASTMAG-2022) : Book of abstracts / program com. S. G. Ovchinnikov [et al.]. - 2022. - Vol. 2, Sect. K : Magnetic semiconductors, multiferroics, topological insulators. - Ст. K.P14. - P. 335-336. - Cited References: 5 . - ISBN 978-5-94469-051-7

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russia
Scientific-Practical Materials Research Center NAS, Minsk, Belarus

Доп.точки доступа:
Romanova, O. B.; Романова, Оксана Борисовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Udod, L. V.; Удод, Любовь Викторовна; Yanushkevich, K. I.; Galays, A. I.; Zhivulko, A. M.; 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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