Perspective on synthesis, structure, and magnetic properties of R-Fe-H hydrides

0553367 - FZÚ 2022 RIV US eng J - Journal Article
Tereshina, I. S. - Pankratov, N.Yu. - Karpenkov, A.Yu. - Gorbunov, D.I. - Doerr, M. - Paukov, M.A. - Tereshina-Chitrova, Evgenia - Andreev, Alexander V.
Perspective on synthesis, structure, and magnetic properties of R-Fe-H hydrides.
Journal of Applied Physics. Roč. 130, č. 22 (2021), č. článku 220902. ISSN 0021-8979. E-ISSN 1089-7550
R&D Projects: GA MŠMT(CZ) LM2018096; GA ČR(CZ) GA19-00925S
Institutional support: RVO:68378271
Keywords : intermetallic compounds * magnetic materials * hydrogen absorption * phase transitions * high magnetic fields * magnetocaloric effect
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.877, year: 2021
Method of publishing: Limited access
https://doi.org/10.1063/5.0073521

The structural and magnetic properties of the multicomponent R-Fe-H compounds with a high content of Fe and hydrogen are reported. The process of synthesis of the hydrides (Nd,R)2Fe14BH5.5, where R are heavy (Dy, Ho, Er, Tm) rare earth metals with a maximum hydrogen content, is described in detail. The work also provides insights into the synthesis of single-crystalline hydrides using the example of the R2(Fe,Co)14B-H series. The studied hydrides have a significantly increased volume as compared to the parent materials. High-field magnetization studies of both parent and hydrogenated compounds at low temperatures are presented. Spin-reorientation phase transitions induced by an external magnetic field are observed. Magnetocaloric effect (MCE) for the compounds with a magnetic compensation point is studied with a special emphasis placed on the change of MCE sign.
Permanent Link: http://hdl.handle.net/11104/0328326