Библиографическое описание:Structural Disorder, Specific Heat, and Magnetic Transitions in Cu2FeBO5 : научное издание / Yu. S. Gokhfeld [et al.]. - Текст : непосредственный // Journal of Experimental and Theoretical Physics. - 2023. - Т.137, №4. - P. 494-505. - This study was supported by the Russian Foundation for Basic Research, project NNIO_a no. 21-52-12033). - ISSN 1063-7761. - ISSN 1090-6509, DOI 10.1134/s1063776123100175.
Аннотация:Cu<sub>2</sub>FeBO<sub>5</sub> ludwigite single crystals have been grown from a solution–melt by spontaneous crystallization. Using the X-ray diffraction method, the crystal structure has been resolved in detail. Cations in sites M2, M3, and M4 have turned out to be structurally disordered. It has been found that oxygen atoms are disordered in one of five nonequivalent sites (O4). As can be seen from Mössbauer spectroscopy data, Fe<sup>3+</sup> ions occupy four nonequivalent sites with different distortions of coordination octahedra. In the temperature range 40 K ≤ <i>T</i> ≤ 300 K, the spectra represent a superposition of quadrupole doublets. Static susceptibility measurements have revealed two magnetic features at <i>T</i><sub>1</sub> = 35 K and <i>T</i><sub>2</sub> = 20 K and spin-glass effects. Specific heat measurements in the interval 4–300 K have not discovered magnetic-transition-related anomalies.
Издательство:Pleiades Publishing, Ltd. (Плеадес Паблишинг, Лтд), Москва
Источник:Journal of Experimental and Theoretical Physics
Выпуск:Т.137, №4
Номера страниц:494-505
Держатель оригинала документа:Ioffe Institute, Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Science Center (KSC), Siberian Branch, Russian Academy of Sciences, National Research Center Kurchatov Institute, Siberian Federal University
Количество экземпляров:
Твёрдая копия издания отсутствует в фонде библиотеки
Ключевые слова:Particle and nuclear physics, Classical and Quantum Gravitation, relativity theory, elementary particles, quantum field theory, solid state physics
