Microscopic nature of the first-order field-induced phase transition in the strongly anisotropic ferrimagnet HoFe.sub.5./sub.Al.sub.7./sub.

0520931 - FZÚ 2020 RIV US eng J - Článek v odborném periodiku
Gorbunov, D.I. - Strohm, C. - Henriques, Margarida Isabel Sousa - van der Linden, P. - Pedersen, B. - Mushnikov, N. V. - Rosenfeld, E.V. - Petříček, Václav - Mathon, O. - Wosnitza, J. - Andreev, Alexander V.
Microscopic nature of the first-order field-induced phase transition in the strongly anisotropic ferrimagnet HoFe₅Al₇.
Physical Review Letters. Roč. 122, č. 12 (2019), s. 1-6, č. článku 127205. ISSN 0031-9007. E-ISSN 1079-7114
Grant CEP: GA ČR(CZ) GA19-00925S; GA ČR GA16-03593S; GA ČR(CZ) GJ19-07931Y
Institucionální podpora: RVO:68378271
Klíčová slova: ferrimagnetism * exchange interactions * magnetic anisotropy * field-induced transition
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 8.385, rok: 2019
Způsob publikování: Omezený přístup
https://doi.org/10.1103/physrevlett.122.127205

We report on x-ray magnetic circular dichroism experiments in pulsed fields up to 30 T to follow the rotations of individual magnetic moments through the field-induced phase transition in the ferrimagnet HoFe5Al7. Near the ground state, we observe simultaneous stepwise rotations of the Ho and Fe moments and explain them using a two-sublattice model for an anisotropic ferrimagnet with weak intersublattice exchange interactions. Near the compensation point, we find two phase transitions. The additional magnetization jump reflects the fact that the Ho moment is no longer rigid as the applied field acts against the intersublattice exchange field.
Trvalý link: http://hdl.handle.net/11104/0305609