期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 316, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2022.123576
关键词
Permanent magnets; Transition metal alloys and compounds; X-ray diffraction; Magnetic measurements; Computer simulations
资金
- Swedish Foundation for Strategic Research (SSF) [EM-16-0039]
- Swedish Research Council [2019-00207]
- Swedish Research Council [2019-00207] Funding Source: Swedish Research Council
A series of Fe5Si1-xGexB2 compounds were synthesized and their structural and magnetic properties were investigated. The compounds maintained the Mo5SiB2-type structure with Ge content below 0.15, and the unit cell parameters expanded as Ge content increased. The saturation magnetisation decreased slightly with increasing Ge content, while the magnetocrystalline anisotropy energy remained almost unchanged. The Curie temperature for all compounds studied was 790K, and the spin-reorientation temperature decreased from 172K to 101K at x = 0.15.
A series of compounds with compositions Fe5Si1-xGexB2 were synthesised and their structural and magnetic properties were investigated. The Mo5SiB2-type structure with tetragonal I4/mcm space group is maintained for all compounds with x < 0.15, which is estimated as the compositional limit of the system. The unit cell pa-rameters expand with Ge content before reaching a plateau of a = 5.5581(1) and c = 10.3545(1) angstrom at x = 0.15. The saturation magnetisation (MS) decreased slightly with increasing Ge content whilst the magnetocrystalline anisotropy energy (MAE) remains almost unaffected. The Curie temperature for all compounds studied is at 790 K whilst the spin-reorientation temperature shows suppression from 172 K to 101 K where x = 0.15. Ab Initio calculations reveal an increase in MAE for compositions up to x = 0.25 and a decreased magnitude of MAE of-0.14 MJ/m3 for the hypothetical compound Fe5GeB2 relative to the parent compound Fe5SiB2.
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