Spin-orbit coupling induced anisotropy effects in bimetallic antiferromagnets: A route towards antiferromagnetic spintronics

0354991 - FZÚ 2011 RIV US eng J - Journal Article
Shick, Alexander - Khmelevskyi, S. - Mryasov, O. N. - Wunderlich, J. - Jungwirth, Tomáš
Spin-orbit coupling induced anisotropy effects in bimetallic antiferromagnets: A route towards antiferromagnetic spintronics.
Physical Review. B. Roč. 81, č. 21 (2010), 212409/1-212409/4. ISSN 1098-0121
R&D Projects: GA AV ČR IAA100100912; GA ČR GA202/07/0456; GA AV ČR KAN400100652; GA ČR GEFON/06/E002
EU Projects: European Commission(XE) 215368 - SemiSpinNet; European Commission(XE) 214499 - NAMASTE
Grant - others:AV ČR(CZ) AP0801
Program: Akademická prémie - Praemium Academiae
Institutional research plan: CEZ:AV0Z10100520; CEZ:AV0Z10100521
Keywords : magnetic anisotropy * tunneling anisotropic magneto-resistance * exchange bias
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.772, year: 2010
http://link.aps.org/doi/10.1103/PhysRevB.81.212409

Magnetic anisotropy phenomena in bimetallic antiferromagnets Mn2Au and MnIr are studied by first-principles density-functional theory calculations. We find strong and lattice-parameter-dependent magnetic anisotropies of the ground-state energy, chemical potential, and density of states, and attribute these anisotropies to combined effects of large moment on the Mn 3d shell and large spin-orbit coupling on the 5d shell of the noble metal. Large magnitudes of the proposed effects can open a route towards spintronics in compensated antiferromagnets without involving ferromagnetic elements.
Permanent Link: http://hdl.handle.net/11104/0193860