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Pressure effect on magnetic moments in ordered Ni.sub.3./sub.Mn anddisordered Ni.sub.100-x./sub.Mn.sub.x./sub. alloys: ab initio calculation and experiment
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SYSNO ASEP 0361327 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Pressure effect on magnetic moments in ordered Ni3Mn anddisordered Ni100-xMnx alloys: ab initio calculation and experiment Author(s) Kamarád, Jiří (FZU-D) RID, ORCID
Kudrnovský, Josef (FZU-D) RID, ORCID
Arnold, Zdeněk (FZU-D) RID, SAI, ORCID
Drchal, Václav (FZU-D) RID, ORCID
Turek, I. (CZ)Source Title High Pressure Research. - : Taylor & Francis - ISSN 0895-7959
Roč. 31, č. 1 (2011), s. 116-120Number of pages 5 s. Language eng - English Country GB - United Kingdom Keywords TB-LMTO-CPA ; disordered-local moment ; Ni3Mn ; pressure Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GA202/09/1027 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100521 - FZU-D (2005-2011) AV0Z10100520 - FZU-D (2005-2011) UT WOS 000288660500024 DOI 10.1080/08957959.2010.529808 Annotation We have revealed a substantial difference in the pressure behavior of magnetization of the ordered Ni3Mn and the disordered Ni75Mn25 and Ni80Mn20 alloys in the pressure range up to 1.2 GPa. To explain in detail the peculiarities of magnetic properties of the Ni-rich NiMn alloys, the reference electronic structure of the alloys was calculated using the tight-binding linear muffin-tin orbital approach. The effect of disorder was described by the coherent potential approximation. The theoretical ab initio calculations (with changes of the lattice parameters up to 1%) elucidated the pressure stability of the magnetic Mn moments and revealed that the very pronounced decrease in the magnetization of the disordered alloys under pressure is caused by the relatively small change in portion of the Mn moments with parallel and anti-parallel orientation with respect to the total moment. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2012
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