Magnetocrystalline anisotropy of FePt: a detailed view

0466854 - FZÚ 2017 RIV US eng J - Journal Article
Khan, S.A. - Blaha, P. - Ebert, H. - Minár, J. - Šipr, Ondřej
Magnetocrystalline anisotropy of FePt: a detailed view.
Physical Review B. Roč. 94, č. 14 (2016), 1-10, č. článku 144436. ISSN 2469-9950. E-ISSN 2469-9969
Institutional support: RVO:68378271
Keywords : magnetocrystalline anisotropy * FePt * LDA
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.836, year: 2016

To get a reliable ab initio value for the magnetocrystalline anisotropy (MCA) energy of FePt, we employ the full-potential linearized augmented plane wave (FLAPW) method and the full-potential Korringa-Kohn-Rostoker (KKR) Green function method. The MCA energies calculated by both methods are in good agreement with each other. As the calculated MCA energy significantly differs from experiment, it is clear that many-body effects beyond the local density approximation are essential. It is not really important whether relativistic effects for FePt are accounted for by solving the full Dirac equation or whether the spin-orbit coupling (SOC) is treated as a correction to the scalar-relativistic Hamiltonian. From the analysis of the dependence of the MCA energy on the magnetization angle and on the SOC strength it follows that the main mechanism of MCA in FePt can be described within second order perturbation theory.
Permanent Link: http://hdl.handle.net/11104/0265123