Investigation of the field-induced phase transitions in the (R,R').sub.2./sub.Fe.sub.14./sub.B bare-earth intermetallics in ultrahigh magnetic fields

0541900 - FZÚ 2022 RIV US eng J - Journal Article
Kostyuchenko, N.V. - Tereshina, I. S. - Andreev, Alexander V. - Doerr, M. - Tereshina-Chitrova, Evgenia - Paukov, M.A. - Gorbunov, D.I. - Politova, G.A. - Pyatakov, A.P. - Miyata, A. - Drachenko, O. - Zvezdin, A. K. - Portugall, O.
Investigation of the field-induced phase transitions in the (R,R')₂Fe₁₄B bare-earth intermetallics in ultrahigh magnetic fields.
IEEE Transactions on Magnetics. Roč. 57, č. 2 (2021), č. článku 2101105. ISSN 0018-9464. E-ISSN 1941-0069
R&D Projects: GA ČR(CZ) GA19-00925S; GA MŠMT(CZ) LM2018096
Institutional support: RVO:68378271
Keywords : rare-earth intermetallics * ferrimagnetism * ultra-high magnetic fields * field-induced transtions
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 1.848, year: 2021
Method of publishing: Limited access
https://doi.org/10.1109/TMAG.2020.3014664

In this work, we perform a comparative study of the magnetization behavior of four series of compounds R2Fe14B and their hydrides R2Fe14BH5.5, and the compositions (Nd0.5R'0.5)2Fe14B and their hydrides (Nd0.5R'0.5)2Fe14BH5.5 with R' = Ho, Er and Tm. The magnetization is measured in pulsed magnetic fields up to 58 T and in megagauss fields up to 135 T at 5 K. The first and second critical fields of the field-induced transitions, Hc1 and Hc2 were estimated analytically and the results were verified against experimental data. We find that hydrogenation of R2Fe14B and (Nd0.5R'0.5)2Fe14B reduces drastically the Hc1 and Hc2 values and, as a consequence, the intersublattice R–Fe exchange interaction parameter lambda.
Permanent Link: http://hdl.handle.net/11104/0319396