Enviar artigo por via de e-mail Strukturnyy besporyadok, teploemkost' i magnitnye perekhody v cu2febo5
- Autores: Gokhfel'd Y.1, Kazak N.1, Bel'skaya N.2, Molokeev M.1,3, Gudim I.1, Kondrat'ev O.4, Eremin E.1,3, Knyazev Y.1, Velikanov D.1
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Afiliações:
- Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Science Center (KSC), Siberian Branch, Russian Academy of Sciences
- Ioffe Institute
- Siberian Federal University
- National Research Center Kurchatov Institute
- Edição: Volume 164, Nº 4 (2023)
- Páginas: 571-583
- Seção: Articles
- URL: https://journals.rcsi.science/0044-4510/article/view/247326
- DOI: https://doi.org/10.31857/S0044451023100103
- EDN: https://elibrary.ru/XMUSFX
- ID: 247326
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Resumo
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 ≤ T ≤ 300 K, the spectra represent a superposition of quadrupole doublets. Static susceptibility measurements have revealed two magnetic features at T1 = 35 K and T2 = 20 K and spin-glass effects. Specific heat measurements in the interval 4–300 K have not discovered magnetic-transition-related anomalies.
Sobre autores
Yu. Gokhfel'd
Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Science Center (KSC), Siberian Branch, Russian Academy of Sciences
Email: yugo@iph.krasn.ru
660036, Krasnoyarsk, Russia
N. Kazak
Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Science Center (KSC), Siberian Branch, Russian Academy of Sciences
Email: nat@iph.krasn.ru
660036, Krasnoyarsk, Russia
N. Bel'skaya
Ioffe Institute
Email: yugo@iph.krasn.ru
194021, St. Petersburg, Russia
M. Molokeev
Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Science Center (KSC), Siberian Branch, Russian Academy of Sciences; Siberian Federal University
Email: yugo@iph.krasn.ru
660036, Krasnoyarsk, Russia; 660041, Krasnoyarsk, Russia
I. Gudim
Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Science Center (KSC), Siberian Branch, Russian Academy of Sciences
Email: yugo@iph.krasn.ru
660036, Krasnoyarsk, Russia
O. Kondrat'ev
National Research Center Kurchatov Institute
Email: yugo@iph.krasn.ru
123182, Moscow, Russia
E. Eremin
Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Science Center (KSC), Siberian Branch, Russian Academy of Sciences; Siberian Federal University
Email: yugo@iph.krasn.ru
660036, Krasnoyarsk, Russia; 660041, Krasnoyarsk, Russia
Yu. Knyazev
Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Science Center (KSC), Siberian Branch, Russian Academy of Sciences
Email: yugo@iph.krasn.ru
660036, Krasnoyarsk, Russia
D. Velikanov
Kirensky Institute of Physics, Federal Research Center Krasnoyarsk Science Center (KSC), Siberian Branch, Russian Academy of Sciences
Autor responsável pela correspondência
Email: yugo@iph.krasn.ru
660036, Krasnoyarsk, Russia
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