Field-induced magnetic transitions in the highly anisotropic ferrimagnet ErFe.sub.5./sub.Al.sub.7./sub. studied by high-field x-ray magnetic dichroism

0585418 - FZÚ 2025 RIV US eng J - Journal Article
Yamamoto, Sh. - Gorbunov, D.I. - Prokhnenko, O. - Weschke, E. - Miyata, A. - Diaz-Ortega, I. F. - Strohm, C. - Duc, F. - Henriques, Margarida Isabel Sousa - Gazizulina, A. - Uhlarz, M. - Mathon, O. - Andreev, Alexander V. - Nojiri, H. - Wosnitza, J.
Field-induced magnetic transitions in the highly anisotropic ferrimagnet ErFe₅Al₇ studied by high-field x-ray magnetic dichroism.
Physical Review B. Roč. 109, č. 9 (2024), č. článku 094404. ISSN 2469-9950. E-ISSN 2469-9969
R&D Projects: GA ČR(CZ) GA21-09766S; GA MŠMT(CZ) LM2018096; GA MŠMT LM2023065
Institutional support: RVO:68378271
Keywords : rare-earth intermetallics * strong magnetic anisotropy
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.7, year: 2022

We present a comprehensive study of the magnetic properties of the strongly anisotropic ferrimagnet ErFe5Al7 in pulsed magnetic fields up to 30 T applied along the hard magnetization axis within the basal plane of the tetragonal lattice around the compensation temperature (Tcomp). Macroscopic measurements showed two anomalies at about 8 T and 25 T in a small temperature range around Tcomp. High-field x-ray magnetic circular dichroism (XMCD) data at the Er M5- and the Fe L3-edge resonances provide insight into the element-selective magnetization processes, revealing a coherent rotation of Er-4f and Fe-3d moments, with stepwise jumps including an unexpected one from an easy to a hard magnetization axis. XMCD at the Er L3-edge resonance elucidates the role of Er 5d electrons in coupling Er-4f and Fe-3d moments. In-plane anisotropy constant was evaluated from a simulation of the magnetization process at temperatures well below Tcomp using a two-sublattice model.
Permanent Link: https://hdl.handle.net/11104/0353354