Surface-termination-dependent magnetism and strong perpendicular magnetocrystalline anisotropy of an FeRh(001) thin film

0452103 - FZÚ 2016 RIV US eng J - Článek v odborném periodiku
Jekal, S. - Rhim, S.H. - Hong, S.C. - Son, W.-J. - Shick, Alexander
Surface-termination-dependent magnetism and strong perpendicular magnetocrystalline anisotropy of an FeRh(001) thin film.
Physical Review. B. Roč. 92, č. 6 (2015), " 064410-1"-" 064410-6". ISSN 1098-0121
Grant CEP: GA ČR GA15-07172S
Institucionální podpora: RVO:68378271
Klíčová slova: magnetic anisotropy * magnetic recording * surface science
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 3.736, rok: 2014

The magnetism of FeRh (001) films strongly depends on film thickness and surface terminations. While the magnetic ground state of bulk FeRh is G-type antiferromagnetism, the Rh-terminated films exhibit ferromagnetism with strong perpendicular magnetocrystalline anisotropy whose energy +2.1 meV/square is two orders of magnitude greater than bulk 3d conventional magnetic metals (square is the area of a two-dimensional unit cell). While the Goodenough-Kanamori-Anderson rule on the superexchange interaction is crucial in determining the magnetic ground phases of FeRh bulk and thin films, the magnetic phases are the results of interplay and competition between three mechanisms—the superexchange interaction, the Zener-type direct interaction, and energy gain by Rh magnetization.
Trvalý link: http://hdl.handle.net/11104/0253126