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Ab Initio theory of the Gilbert damping in random ferromagnetic alloys
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SYSNO ASEP 0482219 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Ab Initio theory of the Gilbert damping in random ferromagnetic alloys Author(s) Drchal, Václav (FZU-D) RID, ORCID
Turek, I. (CZ)
Kudrnovský, Josef (FZU-D) RID, ORCIDNumber of authors 3 Source Title Journal of Superconductivity and Novel Magnetism. - : Springer - ISSN 1557-1939
Roč. 30, č. 6 (2017), s. 1669-1672Number of pages 4 s. Language eng - English Country US - United States Keywords Gilbert damping ; ferromagnetic alloys ; ab initio ; nonlocal torques Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects GA15-13436S GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000401348600037 EID SCOPUS 84982105686 DOI 10.1007/s10948-016-3662-4 Annotation We present an ab initio theory of the Gilbert damping in ferromagnetic alloys with substitutional disorder. The theory is based on nonlocal torques represented by nonrandom, site-off-dagonal, and spin-independent matrices. The formalism is developed for the relativistic tight-binding linear muffin-tin orbital (TB-LMTO) method and the coherent potential approximation (CPA). The CPA vertex corrections play a crucial role for the internal consistency of the theory and for its exact equivalence to other first-principles approaches based on random local torques. The theory is illustrated by calculations for various random transition metal alloys. Results are in a reasonable agreement with other calculations and accessible experimental data. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2018
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