Библиотека института физики им. Л.В. Киренского СО РАН

Главная

Базы данных

Труды сотрудников ИФ СО РАН - результаты поиска

Вид поиска

Каталог книг и брошюр библиотеки ИФ СО РАН

Каталог журналов библиотеки ИФ СО РАН

Труды сотрудников ИФ СО РАН

Область поиска

в найденном

Найдено в других БД:

Каталог книг и брошюр библиотеки ИФ СО РАН (27)

Каталог журналов библиотеки ИФ СО РАН (2)

Формат представления найденных документов:
полный	информационный	краткий

Отсортировать найденные документы по:
автору	заглавию	году издания	типу документа

Поисковый запрос: (<.>K=transitions<.>)

Общее количество найденных документов : 786
Показаны документы с 1 по 20

Phase transitions in (NH4)2MoO2F4: effect of hydrostatic and chemical pressure [Text] / Bogdanov E., Fokina V., Flerov I., Gorev M., Vasiliev A., Pogoreltsev E., Laptash N. // 9th Russai/CIS/Baltic/Japan symposium on ferroelectricity : abstracts book : June 15-19, 2008, Vilnius, Lithuania. - p. 139

Доп.точки доступа:
Bogdanov, E. V.; Богданов, Евгений Витальевич; Fokina, V. D.; Фокина, Валентина Дмитриевна; Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Pogoreltsev, E. I.; Погорельцев, Евгений Ильич; Laptash, N. M.; Russia/CIS/Baltic/Japan Symposium on Ferroelectricity(9 ; 2008 ; May ; Vilnus, Lithuania)
}
Найти похожие

Ferroelectric and ferroelastic phase transitions in some oxyfluorides A2AMOxF6-x with elpasolite-cryolite structure [Text] / Flerov I. // 9th Russai/CIS/Baltic/Japan symposium on ferroelectricity : abstracts book : June 15-19, 2008, Vilnius, Lithuania. - p. 113

Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Russia/CIS/Baltic/Japan Symposium on Ferroelectricity(9 ; 2008 ; May ; Vilnus, Lithuania)
}
Найти похожие

The study of peculiarity of phase transitions in (NH4)2WO2F4 by inelastic neutrov scattering / Smirnov L., Kolesnikov A., Flerov I., Laptsh N. // 9th Russian/CIS/Baltic/Japan symposium on ferroelectricity, June 15-19, 2008, Vilnius, Lithuania, p.136

Доп.точки доступа:
Smirnov, L.; Kolesnikov, A.; Flerov, I. N.; Флёров, Игорь Николаевич; Laptash, N. M.
}
Найти похожие

Ordering processes and phase transitions in ammonium-containing crystals of A2BWO3F3 elpasolites – com?parative Raman and infrared study [Text] / A. N. Vtyurin, A. S. Krylov [et al.] // The 6th International Seminar on Ferroelastics Physics (ISFP-6) : Voronezh, September 22–25, 2009. - P23

Доп.точки доступа:
Vtyurin, A.N.; Krylov, A.S.; Gerasimova, Ju.V.; Ivanenko, A.A.; Shestakov, N.P.; Laptash, N.M.; International Seminar on Ferroelastic Physics(6 ; 2009 ; Sept. ; 22-25 ; Voronezh)
}
Найти похожие

Effect of central cation substitution on the properties and phase transitions in (NH4)3Me(O2)2F4 oxyfluorides [Text] / V. D. Fokina, I. N. Flerov [et al.] // The 6th International Seminar on Ferroelastics Physics (ISFP-6) : Voronezh, September 22–25, 2009. - P43

Доп.точки доступа:
Fokina, V.D.; Flerov, I.N.; Molokeev, M.S.; Pogoreltsev, E.I.; Bogdanov, E.V.; Laptash, N.M.; International Seminar on Ferroelastic Physics(6 ; 2009 ; Sept. ; 22-25 ; Voronezh)
Свободных экз. нет}
Найти похожие

Spin crossover and resulting insultor?metal transitions in Mott insulators under high pressure / S. G. Ovchinnikov, I. S. Lyubutin [et al.] // XXXV Совещание по физике низких температур (НТ-35) : тезисы докладов : Черноголовка, 29 сентября - 2 октября 2009 г. / Сов. по физ. низких температур. - P85 . - ISBN 978-5-94691-384-3

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Lyubutin, I. S.; Gavriliuk, A. G. ; Struzhkin, V. V.; Совещание по физике низких температур(35 ; 2009 ; сент.-окт. ; Черноголовка)
}
Найти похожие

    Flux growth and phase transitions in Ni3−xMnxBO5:Cu compound / E. Moshkina, N. Mikhashenok, A. Shabanov [et al.] // J. Alloys Compd. - 2025. - Vol. 1010. - Ст. 178297, DOI 10.1016/j.jallcom.2024.178297. - Cited References: 33. - This research was supported by the Russian Science Foundation (project no. 23–72–00047). The work was carried out using the equipment of a unique scientific installation "Neutron Research Complex based on the IR-8 Reactor". XPS measurements were performed with the support from Kazan Federal University’s PRIORITET-2030 Program of Strategic Academic Leadership. The work of E.E.V. was carried out within the state assignment of Kirensky Institute of Physics . - ISSN 0925-8388. - ISSN 1873-4669
   Перевод заглавия: Раствор-расплавный рост и фазовые переходы в соединении Ni3–xMnxBO5:Cu
Кл.слова (ненормированные):
Ludwigite -- Flux growth -- ESR -- Ferrimagnetic -- Spin-glass -- Neutron scattering
Аннотация: For the first time, single crystals of Ni3−xMnxBO5:Cu, measuring up to 0.4×0.4×4 mm3, have been grown using the flux technique. The flux used was based on Bi2Mo3O12-B2O3; the addition of CuO served as a solvent component and promoted the growth of Ni3−xMnxBO5:Cu. Energy-dispersive X-ray spectroscopy (EDX) showed that the concentration of copper in the crystal, relative to the flux content was low-approximately 1:8. Subsequently, neutron diffraction, alternating current (AC) magnetization, and electron spin resonance (ESR) were performed on the Ni3−xMnxBO5:Cu compound, which is classified as ludwigite-type compound. Neutron diffraction results confirmed that the Ni3− xMnxBO5:Cu structure belongs to the Pbam space group. Furthermore, AC magnetization and ESR measurements identified three ferrimagnetic phase transitions occurring at 90 K, 95 K, and 150 K, as well as a canonical spin-glass transition near 50 K.

Смотреть статью,
WOS
Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk 660036, Russia
Federal Research Center "Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences", Krasnoyarsk 660036, Russia
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk 660037, Russia
Zavoisky Physical-Technical Institute, Federal Research Center "Kazan Scientific Center of RAS", Kazan 420029, Russia
Institute of Physics, Kazan Federal University, Kazan 420008, Russia

Доп.точки доступа:
Moshkina, E. M.; Мошкина, Евгения Михайловна; Mikhashenok, N. V.; Михашенок, Наталья Владимировна; Shabanov, A. V.; Шабанов, Александр Васильевич; Eremin, E. V.; Еремин, Евгений Владимирович; Yatsyk, I.; Yanilkin, I.; Shustov, V.; Popov, D.; Eremina, R.
}
Найти похожие

Structural and magnetic phase transitions in Eu1-xLaxFe3(BO3)4 (x = 0, 0.18) / E. S. Smirnova, K. V. Frolov, E. V. Sidorova [et al.] // Acta Crystallogr. B: Struct. Sci. Cryst. Eng. Mater. - 2025. - Vol. 81, Is. 1. - P. 69-83, DOI 10.1107/S2052520624011569. - Cited References: 64. - The following funding is acknowledged: Russian Science Foundation (grant No. 23-22-00286) . - ISSN 2052-5206
Кл.слова (ненормированные):
rare-earth iron borates -- solid solutions -- low-temperature X-ray diffraction -- Mössbauer spectroscopy -- heat capacity measurements -- single crystals -- phase transitions -- negative thermal expansion
Аннотация: The crystal structures and hyperfine magnetic parameters of EuFe3(BO3)4 and mixed Eu0.82La0.18Fe3(BO3)4 were studied over a wide temperature range in order to analyze correlations of the structural and magnetic features and the phase transitions in multiferroic compounds of the rare-earth iron borate family. The chemical compositions of the crystals are reported from X-ray fluorescence analysis. The crystal structures of EuFe3(BO3)4 and Eu0.82La0.18Fe3(BO3)4 were determined using single-crystal X-ray diffraction in the temperature range 25-500 K. A structural phase transition is observed in EuFe3(BO3)4 below 89 K which is related to distortions in the interatomic distances and angles. The most significant of which are for R-O, R-B, R-Fe, Fe-O and Fe-Fe distances, and the angles between the BO3 triangles and the ab plane. There is no structural phase transition in lanthanum-doped EuFe3(BO3)4 based on specific heat measurements (2.2-101.3 K) and structure analysis (25-500 K), and the temperature dependences of the interatomic distances and angles are smooth. The lengths of the superexchange paths needed for the appearance of a structural phase transition in RFe3(BO3)4 have been proposed. Negative thermal expansion is observed for both compounds below 90 K, resulting from a growth of the interatomic Fe-Fe distances in the iron chains during cooling. The largest atomic displacement parameters are observed for O atoms (O2), indicating that they have the highest mobility. The magnetic properties of EuFe3(BO3)4 and Eu0.82La0.18Fe3(BO3)4 were analyzed using Mossbauer spectroscopy in the temperature range 4.5-298 K. Neel temperatures (TN) of 34.57 (1) and 32.22 (1) K are obtained based on Mossbauer spectroscopy for the pure and doped crystals, respectively. The maximum specific heat capacity temperature dependence related to the magnetic phase transition for the doped crystal is observed at 31.2 K. A violation of the strict arrangement of antiferromagnetic ordering in the ab plane in the La-doped crystals at low temperatures is suggested. The magnetic contributions of the two structural positions of the iron ions to the Mossbauer spectra could not be distinguished in either pure and doped compounds, regardless of whether they are in the paramagnetic and antiferromagnetic regions.

Смотреть статью,
WOS,
Читать в сети ИФ
Держатели документа:
Shubnikov Institute of Crystallography of National Research Centre "Kurchatov Institute", Moscow 119333, Russian Federation
Kurnakov Institute of General and Inorganic Chemistry RAS, Moscow 119071, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Smirnova, E. S.; Frolov, K. V.; Sidorova, E. V.; Sorokin, T. A.; Alekseeva, O. A.; Guskov, A. V.; Gagarin, P. G.; Gudim, I. A.; Гудим, Ирина Анатольевна
}
Найти похожие

Synthesis and optical properties of organic-inorganic hybrid [(18-Crown-6)K][MoOCl4(H2O)] / A. Ghosh, S. Saikia, M. S. Molokeev, A. Nag // Chem. Asian J. - 2025. - Vol. 20, Is. 1. - Ст. e202401052, DOI 10.1002/asia.202401052. - Cited References: 18. - A.N. acknowledges Science & Engineering Research Board, India, for Swarnajayanti Fellowship (SB/SJF/2020-21/02), and BRICS grant (e-27558) of Department of Science and Technology, India. A.G. acknowledges University Grants Commission (UGC) India for research fellowship. S.S. acknowledges Prime Minister’s Research Fellowship (PMRF), Ministry of Education, India . - ISSN 1861-4728. - ISSN 1861-471X
Кл.слова (ненормированные):
Hybrid [(18-Crown-6)K][MoOCl4(H2O)] -- Crown-ether coordination compounds -- Near infrared photoluminescence -- d – d transitions
Аннотация: Crown ether anchored organic-inorganic hybrid halides have been recently reported as interesting luminescent materials in the visible region of electromagnetic spectrum. Is it possible to develop such crown ether anchored hybrid materials for near infrared emission? Motivated by this question, we designed a new hybrid material, namely, [(18-Crown-6)K][MoOCl4(H2O)]. 18-Crown-6 ether bound with K+ form the cationic part [(18-Crown-6)K]+. The K+ of [(18-Crown-6)K]+ electrostatically interacts with Cl- of the anionic part [MoOCl4(H2O)]- , forming the hybrid crystal [(18-Crown-6)K][MoOCl4(H2O)]. It crystallizes in orthorhombic crystal system with Pnma space group. The Mo(V) possesses one d-electron (d1) in C4v point group symmetry in the [MoOCl4(H2O)]- polyhedra. This electronic configuration leads to multiple spin-allowed d – d transitions along with a ligand to metal charge transfer (LMCT) resulting into multiple optical absorption bands in the near UV-visible-near infrared (NIR) region. The lowest energy d – d transition via 2E (d1xz,dyz)/2E (dxz; d1yz)→2B2 (d1xy) leads to NIR PL with peak at 952 nm, but with a poor intensity at room temperature.

Смотреть статью,
WOS
Держатели документа:
Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune 411008, India
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Department of Physics and Technical Sciences, Western Caspian University, Baku AZ 1001, Azerbaijan

Доп.точки доступа:
Ghosh, A.; Saikia, S.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Nag, A.
}
Найти похожие

10.

Features of the formation of baro- and piezocaloric effects in ferroelastics and ferroelectrics / I. N. Flerov, M. V. Gorev, E. V. Bogdanov [et al.] // Solid State Sci. - 2025. - Vol. 160. - Ст. 107799, DOI 10.1016/j.solidstatesciences.2024.107799. - Cited References: 42. - The study was supported by the grant from the Russian Science Foundation, Russia №23-22-00115, https://rscf.ru/project/23-22-00115/ . - ISSN 1293-2558. - ISSN 1873-3085
Кл.слова (ненормированные):
Ferroics -- Phase transitions -- Entropy -- Caloric effects
Аннотация: The analysis of baro- and piezo-caloric effects in ferroelectrics and ferroelastics containing tetrahedral and octahedral ion groups in the structure is carried out. The role of the degree of structural disorder in the formation of both effects is discussed. The features of the caloric response at phase transitions of different proximity to the tricritical point are revealed. The strong piezocaloric anisotropy of the studied materials is a convenient tool for extending the operating temperature range of the cooling cycle. An important advantage of ferroelastics and ferroelectrics undergoing transformations of the first order is the combination in one material of low thermal hysteresis and high sensitivity to hydrostatic and/or uniaxial pressure.

Смотреть статью,
WOS
Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, 660074, Krasnoyarsk, Russia
Institute of Engineering Systems and Energy, Krasnoyarsk State Agrarian University, 660049, Krasnoyarsk, Russia

Доп.точки доступа:
Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Bogdanov, E. V.; Богданов, Евгений Витальевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Mikhaleva, E. A.; Михалева, Екатерина Андреевна
}
Найти похожие

11.

Study of phase transitions in α-Fe2O3 during mechanical grinding in a high-energy ball mill / V. D. Elkin, E. N. Lysenko, V. A. Vlasov [et al.] // Russ. Phys. J. - 2025, DOI 10.1007/s11182-025-03448-6. - Cited References: 34. - This study has been funded by the RF Ministry of Higher Education and Science in accordance with the Governmental Assignment in the sphere of scientific research (Project No. FSWW-2023-0011). The Mössbauer examinations were carried out within the framework of the Governmental Assignment for the Kirenskiy Institute of Physics of the Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences . - Article in press. - ISSN 1064-8887. - ISSN 1573-9228
Кл.слова (ненормированные):
Hematite powder -- Mechanical grinding -- Magnetite -- X-ray diffraction analysis -- Phase transformation
Аннотация: The phase transformations, taking place in α−Fe2O3 during its mechanical grinding in an AGO-2C planetary ball mill with an aim to manufacture a Fe3O4-based magnetic powder, are studied. The grinding is performed using steel vials and balls under different modes, grinding times (up to 120 min), mill rotation frequencies (1290, 1820, 2220 rpm), processing media (water, isopropyl alcohol, dry grinding in air), degree of filling vials with balls and powder (from 1/12 to 2/3 of vial volume), and ball-to-powder mass ratios (from 2.5:1 to 20:1). It is shown that different grinding modes strongly affect the−Fe2O3→Fe3O4 phase transition, resulting in different phase concentration ratios in the milled powder. It is noted that the magnetite concentration increases with the grinding energy density, which depends on the rotation frequency and grinding time. The most effective modes of the Fe3O4-based nanostructured powder manufacture are established, which involve the maximum rotation frequency, the grinding time up to 120 min, and the ball-to-powder ratio 10:1. The magnetic powder thus produced has the Curie temperature of 556 °C and the saturation magnetization of 65 emu/g.

Смотреть статью,
WOS
Держатели документа:
Tomsk Polytechnic University, Tomsk, Russian Federation
Federal Research Center Kirensky Institute of Physics of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Elkin, V. D.; Lysenko, E. N.; Vlasov, V. A.; Surzhikov, A. P.; Knyazev, Yu. V.; Князев, Юрий Владимирович
}
Найти похожие

12.

New Sn3Mo2O8 compound: Synthesis and structural transitions / L. V. Udod, S. S. Aplesnin, M. N. Sitnikov [et al.] // Ceram. Int. - 2025, DOI 10.1016/j.ceramint.2025.06.356. - Cited References: 39 . - Article in press. - ISSN 0272-8842. - ISSN 1873-3956
Кл.слова (ненормированные):
Spectroscopy -- Impedance -- Thermopower -- Powders: Solid state reaction
Аннотация: A new Sn3Mo2O8 compound was synthesized and its crystal structure was determined. A Sn3Mo2O8/Bi26Mo10O69 (89%/11%) composite was obtained by the solid-state synthesis. Vibrational modes of octahedra and temperatures of softening and disappearance of some modes from the IR absorption spectra in the temperature range of 80–500 K and the frequency range of 350–7000 cm-1 was found. A correlation was established between the temperatures of the thermopower maxima and softening of IR modes, and anomalous in the temperature coefficient of resistance, impedance, which was explained within the displacement-type phase transition model. The activation energy and temperature range of the ionic conductivity in the Sn3Mo2O8 compound was determined.

Смотреть статью
Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia
Reshetnev Siberian State University of Science and Technology, 660037, Krasnoyarsk, Russia

Доп.точки доступа:
Udod, L. V.; Удод, Любовь Викторовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Sitnikov, M. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Shabanov, A. V.; Шабанов, Александр Васильевич; Romanova, O. B.; Романова, Оксана Борисовна
}
Найти похожие

13.

    Transformation of f-f absorption bands of holmium ions in Ho0.75Nd0.25Fe3(BO3)4 crystal during spin-reorientation transition / A. V. Malakhovskii, A. L. Sukhachev, V. V. Sokolov, I. A. Gudim // Opt. Mater. - 2025. - Vol. 165. - Ст. 117150, DOI 10.1016/j.optmat.2025.117150. - Cited References: 17 . - ISSN 0925-3467. - ISSN 1873-1252
   Перевод заглавия: Трансформация f-f полос поглощения ионов гольмия в кристалле Ho0.75Nd0.25Fe3(BO3)4 во время спинреориентационного перехода
Кл.слова (ненормированные):
Optical transitions -- Magnetic reorientation transition -- Local properties in optically excited states
Аннотация: Polarized absorption spectra of the Ho0.75Nd0.25Fe3(BO3)4 crystal in the region of 5I8→5F5, 5S2 + 5F4, 5F3 and 5F2 absorption bands of Ho ions were studied as a function of temperature in the range of 5–20 K. The absorption spectra were decomposed into Lorentzian or Gaussian components. Below 203 K, the local symmetry of the holmium ion is C2. However, an analysis of the polarization of the absorption lines from the point of view of the selection rules showed that in the easy-axis state of the crystal (T ˂ TR = 6.9 K), the local symmetry of the holmium ion is close to D3. At T ˃ TR, a distortion of the local symmetry appears, which increases with increasing temperature. Shifts in the positions of absorption lines are observed at the spin-reorientation transition. The shifts are different for different lines. This means that the local magnetic anisotropy of the holmium ion, the Ho–Fe exchange energy, and the local crystal field are different in different excited states of holmium. Significant and different changes in the intensity of absorption lines depending on temperature were observed both during the reorientation transition and above it, which is a consequence of changes of the local crystal field in excited states with temperature.

Смотреть статью,
WOS
Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Sokolov, V. V.; Соколов, Валерий Владимирович; Gudim, I. A.; Гудим, Ирина Анатольевна
}
Найти похожие

14.

    Соколов, Валерий Владимирович.
    Магнитный круговой дихроизм и поглощение кристалла Na0.4Ho0.6F2.2 в области f-f переходов / В. В. Соколов, А. В. Малаховский, Д. Н. Каримов // Новое в магнетизме и магнитных материалах : сборник трудов XXV международной конференции / прогр. ком.: Р. С. Исхаков, С. Г. Овчинников [и др.]. - 2024. - Секция 10 [Сборник 10] : Магнитооптика и фотомагнетизм. - С. 42-44. - Библиогр.: 2 . - ISBN 978-5-4465-1869-2
   Перевод заглавия: Magnetic circular dichroism and absorption of Na0.4Ho0.6F2.2 crystal in the region of f-f transitions
Аннотация: Работа посвящена изучению спектров поглощения и магнитного кругового дихроизма (МКД) кристалла Na0.4Ho0.6F2.2. С помощью спектров поглощения и МКД определены и проанализированы температурные зависимости парамагнитной магнитооптической активности f-f переходов в гольмии.
The work is devoted to study of absorption and magnetic circular dichroism (MCD) spectra of Na0.4Ho0.6F2.2 crystal. Temperature dependencies of paramagnetic magneto-optical activity of f-f transitions in holmium were determined and analyzed using absorption spectra and MCD.

Материалы конференции,
Читать в сети ИФ
Держатели документа:
Институт физики им. Л.В. Киренского Сибирского отделения Российской академии наук - обособленное подразделение ФИЦ КНЦ СО РАН
Федеральный научно-исследовательский центр «Кристаллография и фотоника» РАН

Доп.точки доступа:
Исхаков, Рауф Садыкович \прогр. ком.\; Iskhakov, R. S.; Овчинников, Сергей Геннадьевич \прогр. ком.\; Ovchinnikov, S. G.; Малаховский, Александр Валентинович; Malakhovskii, A. V.; Каримов, Д. Н.; Sokolov, V. 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
}
Найти похожие

15.

Structural diversity and phase transitions in Mg2 – xMn1 + xBO5 (x = 0.0, 0.2, 0.4) borates with a mixed valence / N. A. Belskaya, N. V. Kazak, A. D. Vasiliev [et al.] // JETP Lett. - 2024. - Vol. 120, Is. 7. - P. 509-516, DOI 10.1134/S0021364024603075. - Cited References: 28. - This work was supported by the Russian Science Foundation (project no. 24-12-20012, https://rscf.ru/project/24-12-20012/), and by the Krasnoyarsk Regional Science Foundation. The study of the crystal structure of the Mg2MnBO5 polycrystalline sample was supported by the Ministry of Science and Higher Education of the Russian Federation (state assignment for the Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch, Russian Academy of Sciences) . - ISSN 0021-3640. - ISSN 1090-6487
Аннотация: Single and polycrystalline samples of Mg2 – xMn1 + xBO5 (x = 0.0, 0.2, 0.4) oxyborates have been obtained for the first time by spontaneous crystallization from the solution–melt and through a solid-state reaction. X-ray diffraction studies have shown that compounds are crystallized with increasing manganese content in the ludwigite (space group Pbam)–hulsite (space group P2/m)–orthopinakiolite (space group Pbam) series and belong to the “3 A wallpaper” borate family. A common property of materials is the presence of octahedral complexes (walls) consisting of manganese ions with a mixed valence at even crystallographic sites. The dc magnetization and specific heat of the Mg2 – xMn1 + xBO5 (x = 0.0, 0.2, 0.4) compounds have been studied for the first time. These studies have shown that cooling is accompanied by magnetic transitions, which are due to the ordering of several magnetic subsystems.

Смотреть статью,
WOS

Публикация на русском языке Структурное разнообразие и фазовые переходы в боратах со смешанной валентностью Mg2-xMn1+xBO5 (0.0 ˂ x ≤ 0.4) [Текст] / Н. А. Бельская, Н. В. Казак, А. Д. Васильев [и др.]. - 9 с. // Письма в ЖЭТФ. - 2024. - Т. 120 Вып. 7. - С. 530-538

Держатели документа:
Ioffe Institute, 194021, St. Petersburg, Russia
Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Lebedev Physical Institute, Russian Academy of Sciences, 119991, Moscow, Russia

Доп.точки доступа:
Belskaya, N. A.; Бельская, Надежда Алексеевна; Kazak, N. V.; Казак, Наталья Валерьевна; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Eremin, E. V.; Еремин, Евгений Владимирович; Moshkina, E. M.; Мошкина, Евгения Михайловна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gavrilkin, S. Yu.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
}
Найти похожие

16.

Effect of the heterovalent cation substitution Bi3+ → Ba2+ in BaTiO3 on the phase transition Pm-3m ↔ P4mm and efficiency of energy harvesting / V. D. Fokina, M. V. Gorev, V. S. Bondarev [et al.] // Phys. Solid State. - 2024. - Vol. 66, Is. 10. - P. 1701-1708, DOI 10.61011/PSS.2024.10.59632.214. - Cited References: 37 . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
phase transitions -- ferroelectrics -- heat capacity -- thermal expansion -- energy harvesting
Аннотация: The heat capacity, thermal expansion and sensitivity to change of electric field of ceramic samples BaTiO3 and Ba0.97Bi0.02TiO3 were studied. The nature of the influence of chemical pressure and electric field on the main parameters of the phase transition Pm-3m↔ P4mm was revealed. The Olsen thermodynamic cycle was analyzed in the entropy-temperature diagram and the densities of the converted waste heat energy into electrical energy were determined.

Смотреть статью

Публикация на русском языке Влияние гетеровалентного катионного замещения Bi3+ → Ba2+ в BaTiO3 на фазовый переход Pm-3m ↔ P4mm и эффективность сбора энергии [Текст] / В. Д. Фокина, М. В. Горев, В. С. Бондарев [и др.]. - 8 с. // Физ. твердого тела. - 2024. - Т. 66 Вып. 10. - С. 1780-1787

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk, Russia

Доп.точки доступа:
Fokina, V. D.; Фокина, Валентина Дмитриевна; Gorev, M. V.; Горев, Михаил Васильевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Flerov, I. N.; Флёров, Игорь Николаевич
}
Найти похожие

17.

Raman scattering study of structural phase transitions in the iron-substituted of bismuth pyrostannat/mullite composite / L. V. Udod, S. S. Aplesnin, O. B. Romanova, A. S. Krylov // Bull. Russ. Acad. Sci.: Phys. - 2024. - Vol. 88, Suppl. 2. - P. S206-S210, DOI 10.1134/S1062873824709036. - Cited References: 19 . - ISSN 1062-8738. - ISSN 1934-9432
Кл.слова (ненормированные):
Raman scattering -- pyrochlore -- composite -- phase transition -- phonon modes
Аннотация: The relative influence of two different crystal structures of the composite compound Bi2(Sn0.7Fe0.3)2O7/Bi2Fe4O9 with a ratio of 91/9% studied using Raman scattering method. The Raman spectra were studied in the temperature range 93–520 K and the frequency range 1–2000 cm–1. The types of lattice vibrations are determined. A decrease of the frequency of Raman spectra modes was found in the regions of phase transitions Bi2(Sn0.7Fe0.3)2O7 and Bi2Fe4O9. A new mode 406 cm–1 has been established, which is a mixed oscillation of SnO6 in Bi2(Sn0.7Fe0.3)2O7 polyhedra (F2g) at a frequency 400 cm–1 and stretching vibrations of the FeO6 octahedral at a frequency 426 cm–1 Bi2Fe4O9.

Смотреть статью
Держатели документа:
Kirensky Institute of Physics, Federal Research Center "Krasnoyarsk Scientific Center", Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Reshetnev Siberian State University of Science and Technology, 660037, Krasnoyarsk, Russia

Доп.точки доступа:
Udod, L. V.; Удод, Любовь Викторовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Romanova, O. B.; Романова, Оксана Борисовна; Krylov, A. S.; Крылов, Александр Сергеевич
}
Найти похожие

18.

Determination of structural phase transitions in the iron-substituted of bismuth pyrostannate/mullite composite by Raman scattering method / L. V. Udod, S. S. Aplesnin, O. B. Romanova, A. S. Krylov // Bull. Russ. Acad. Sci.: Phys. - 2024. - Vol. 88, Suppl. 2, DOI. - Cited References: 19 . - Article in press. - ISSN 1062-8738. - ISSN 1934-9432
Кл.слова (ненормированные):
Raman scattering -- pyrochlore -- composite -- phase transition -- phonon modes
Аннотация: The relative influence of two different crystal structures of the composite compound Bi2(Sn0.7Fe0.3)2O7/Bi2Fe4O9 with a ratio of 91/9% studied using Raman scattering method. The Raman spectra were studied in the temperature range 93-520 K and the frequency range 1 - 2000 cm-1. The types of lattice vibrations are determined. A decrease of the frequency of Raman spectra modes was found in the regions of phase transitions Bi2(Sn0.7Fe0.3)2O7 and Bi2Fe4O9. A new mode 406 cm-1 has been established, which is a mixed oscillation of SnO6 in Bi2(Sn0.7Fe0.3)2O7 polyhedra (F2g) at a frequency 400 cm-1 and stretching vibrations of the FeO6 octahedral at a frequency 426 cm-1 Bi2Fe4O9.

Смотреть статью
Держатели документа:
Kirensky Institute of Physics Federal Research Center KSC Siberian Branch Russian Academy of Sciences, Krasnoyarsk, 660036, Russia
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russia

Доп.точки доступа:
Udod, L. V.; Удод, Любовь Викторовна; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Romanova, O. B.; Романова, Оксана Борисовна; Krylov, A. S.; Крылов, Александр Сергеевич
}
Найти похожие

19.

    Phase transitions and nonlinear optical property modifications in BaGa4Se7 / L. Isaenko, L. Dong, S. V. Melnikova [et al.] // Inorg. Chem. - 2024. - Vol. 63, Is. 21. - P. 10042-10049, DOI 10.1021/acs.inorgchem.4c01341. - Cited References: 27. - This work was supported by the National Natural Science Foundation of China, grant no. 22133004 (first-principles studies), the Ministry of Education and Science of the Russian Federation, grant FSUS-2020-0036 (crystal growth, crystal structure analysis, and band gap measurement), and partly done on the state assignment of IGM SB RAS no. 122041400031-2 (composition chemical analysis and SHG coefficient measurements) . - ISSN 0020-1669. - ISSN 1520-510X
   Перевод заглавия: Фазовые переходы и нелинейные изменения оптических свойств в BaGa4Se7
Аннотация: Phase transitions can change the crystal structure and modify the physical properties of crystals. In this work, we investigate the phase transition behavior in BaGa4Se7, an important middle infrared (mid-IR) nonlinear optical (NLO) crystal, in the temperature range from room temperature to 1173 K. Interestingly, the BaGa4Se7 crystal undergoes a reversible ferroelastic phase transition at T = 528 K, resulting in the presence of a newly discovered phase (γ-phase) at the higher temperature. The experimental temperature dependence of optical birefringence, as well as the first-principles birefringence and NLO coefficients, reveals that the γ-phase exhibits larger birefringence and better NLO properties compared with those of the low-temperature phase (α-phase). This work demonstrates that phase-transition-induced structural modification can improve the mid-IR NLO properties, which would provide an effective avenue to obtain materials with good optoelectronic performance.

Смотреть статью,
Scopus
Держатели документа:
Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk State University, Novosibirsk 630090, Russia
Functional Crystals Lab, Technical Institute of Physics and Chemistry, CAS, University of Chinese Academy of Sciences, Beijing 100190, China
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk 630090, Russia

Доп.точки доступа:
Isaenko, L.; Dong, L.; Melnikova, S. V.; Мельникова, Светлана Владимировна; Molokeev, M. S.; Молокеев, Максим Сергеевич; Korzhneva, K. E.; Krinitsin, P. G.; Kurus, A. F.; Samoshkin, D. A.; Belousov, R. A.; Lin, Zh.
}
Найти похожие

20.

    Synthesis, crystal structure, and magnetic properties of Ni2CrBO5 / N. A. Belskaya, E. V. Eremin, A. D. Vasiliev [et al.] // J. Magn. Magn. Mater. - 2024. - Vol. 604. - Ст. 172298, DOI 10.1016/j.jmmm.2024.172298. - Cited References: 75. - The authors acknowledge A. Borus for the electrical resistivity measurements. The X-ray diffraction, magnetic, and specific heat measurements were carried out in the Common Access Facility Center of SB RAS (Krasnoyarsk, Russia) and P.N. Lebedev Physical Institute of RAS (Moscow, Russia). - Research is supported by the Russian Science Foundation and Krasnoyarsk Regional Fund of Science and Technology Support, grant No. 24-12-20012, https://rscf.ru/project/24-12-20012/ . - ISSN 0304-8853. - ISSN 1873-4766
   Перевод заглавия: Синтез, кристаллическая структура и магнитные свойства Ni2CrBO5
Кл.слова (ненормированные):
Oxyborates -- Cationic distribution -- Magnetic phase transitions -- Specific heat
Аннотация: Ni2CrBO5 has been synthesized and investigated by X-ray diffraction, dc magnetization, and specific heat measurements. The unusual cation distribution has been established: the M1 and M3 sites are occupied by Ni2+ ions, the M2 site is by Cr3+ ions, and the M4 site is mixed, featuring both Ni2+ and Cr3+ ions. The magnetic order onsets at TN= 140 K, which is confirmed by a λ-type peak in specific heat, followed by the dome-shaped anomaly of the magnetization at about 30 K. In the magnetically ordered state, a remarkable sequence of temperature-induced magnetization reversal sensitive to the measurement’s regime is observed. Dominant antiferromagnetic interactions are characterized by the Weiss temperature θ= −73 K. The effective magnetic moment of 5.37 μB per formula unit is close to the spin-only one. The effect of the cation distribution on the magnetic properties is discussed.

Смотреть статью,
Scopus
Держатели документа:
Ioffe Institute, Polytechnicheskaya street, 26, St.-Petersburg, 194021, Russia
Kirensky Institute of Physics, Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russia
Reshetnev Siberian State University of Science and Technology, 31, Krasnoyarsky Rabochy Av., Krasnoyarsk, 660037, Russia
Lebedev Physical Institute, Russian Academy of Sciences, Leninskiy pr., 14, Moscow, 119991, Russia
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Akademgorodok 50, bld. 24, Krasnoyarsk, 660036, Russia

Доп.точки доступа:
Belskaya, N.A.; Eremin, E. V.; Еремин, Евгений Владимирович; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Gavrilkin, S.Yu.; Vereshchagin, S.N.; Chikurov, D.S.; Krasilin, A.A.; Kazak, N. V.; Казак, Наталья Валерьевна
}
Найти похожие