Тип публикации: статья из журнала
Год издания: 2023
Идентификатор DOI: 10.1134/s1063776123100175
Ключевые слова: Particle and nuclear physics, Classical and Quantum Gravitation, relativity theory, elementary particles, quantum field theory, solid state physics
Аннотация: Cu2FeBO5 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, Fe3+ 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>1 = 35 K and <i>T</i>2 = 20 K and spin-glass effects. Specific heat measurements in the interval 4–300 K have not discovered magnetic-transition-related anomalies.
Журнал: Journal of Experimental and Theoretical Physics
Выпуск журнала: Т.137, №4
Номера страниц: 494-505
ISSN журнала: 10637761
Место издания: Москва
Издатель: Pleiades Publishing, Ltd. (Плеадес Паблишинг, Лтд)