Journal
PHYSICAL REVIEW B
Volume 104, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.104.064405
Keywords
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Funding
- HLD at HZDR
- Deutsche Forschungsgemeinschaft (DFG) [SFB 1143]
- Wurzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter-ct.qmat [EXC 2147, 390858490]
- Czech Science Foundation [19-00925S]
- Materials Growth and Measurement Laboratory (MGML) within the program of Czech Research Infrastructures [LM2018096]
- GIMRT Program of the Institute for Materials Research, Tohoku University [19H0505]
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The study found that TbFe5Al7 undergoes a magnetic transition at high magnetic fields, with Tb 4 f and Fe 3d magnetic moments simultaneously rotating to another easy-axis direction. The magnetic-anisotropy constant of TbFe5Al7 was determined by simulating the magnetization process at high fields.
We performed soft x-ray spectroscopic studies of the ferrimagnet TbFe5Al7 with strong easy-plane anisotropy in pulsed magnetic fields up to 29 T along with bulk magnetization and magnetostriction measurements. We observed pronounced amplitude changes of x-ray magnetic circular dichroism and x-ray absorption spectra at the field-induced magnetic transition. This microscopically evidences the simultaneous rotation of the Tb 4 f and Fe 3d magnetic moments from a collinear ferrimagnetic order along the [100] axis to a state with the moments close to [010], the other easy-axis direction of the tetragonal lattice in magnetic fields applied along the [100] axis. We determined the magnetic-anisotropy constant of TbFe5Al7 by simulating the high-field macro- and microscopic magnetization process using a two-sublattice model.
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