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Phase transitions of anisotropic and exchange origins in TmFe.sub.5./sub.Al.sub.7./sub
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SYSNO ASEP 0432032 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Phase transitions of anisotropic and exchange origins in TmFe5Al7./sub Author(s) Gorbunov, Denis (FZU-D) RID
Yasin, S. (DE)
Andreev, Alexander V. (FZU-D) RID, ORCID
Mushnikov, N. V. (RU)
Rosenfeld, E.V. (RU)
Skourski, Y. (DE)
Zherlitsyn, S. (DE)
Wosnitza, J. (DE)Source Title Physical Review. B - ISSN 1098-0121
Roč. 89, č. 21 (2014), "214417-1"-"214417-9"Number of pages 9 s. Language eng - English Country US - United States Keywords rare-earth intermetallics ; ferrimagnetism ; magnetic anisotropy ; spin-reorientation transition ; high magnetic fields ; field-induced transition Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GAP204/12/0150 GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000338491900002 EID SCOPUS 84903551365 DOI 10.1103/PhysRevB.89.214417 Annotation Magnetization and sound propagation reveal a number of unusual spontaneous and field-induced transformations in ferrimagnetic TmFe5Al7 (TC =193 K). The Tm sublattice provides uniaxial magnetic anisotropy, whereas the Fe sublattice favors an easy-plane anisotropy. A competition between them results in a first-order spin reorientation (SR) at 64 K. The transition is preceded by a first-order magnetization process of type II along the hard axis. The intersublattice Tm-Fe exchange interaction is weakened at SR, the spontaneous magnetic moment disappears, and the ferrimagnetic state changes to antiferromagnetic. With increasing temperature, the strength of the Tm-Fe exchange is recovered, and the ferrimagnetism is restored at 82 K through another first-order phase transformation. Below 40 K, a first-order field-induced transition occurs for a magnetic field applied along the easy [001] axis towards the forced ferromagnetic state observed above 30 T. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2015
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