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Magnetocrystalline anisotropy of FePt: a detailed view
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SYSNO ASEP 0466854 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Magnetocrystalline anisotropy of FePt: a detailed view Author(s) Khan, S.A. (CZ)
Blaha, P. (AT)
Ebert, H. (DE)
Minár, J. (CZ)
Šipr, Ondřej (FZU-D) RID, ORCIDArticle number 144436 Source Title Physical Review B. - : American Physical Society - ISSN 2469-9950
Roč. 94, č. 14 (2016), 1-10Number of pages 10 s. Language eng - English Country US - United States Keywords magnetocrystalline anisotropy ; FePt ; LDA Subject RIV BM - Solid Matter Physics ; Magnetism Institutional support FZU-D - RVO:68378271 UT WOS 000390348300014 EID SCOPUS 84994309306 DOI 10.1103/PhysRevB.94.144436 Annotation 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. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2017
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