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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 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Pressure effect on magnetic moments in ordered Ni3Mn anddisordered Ni100-xMnx alloys: ab initio calculation and experiment Tvůrce(i) 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)Zdroj.dok. High Pressure Research. - : Taylor & Francis - ISSN 0895-7959
Roč. 31, č. 1 (2011), s. 116-120Poč.str. 5 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova TB-LMTO-CPA ; disordered-local moment ; Ni3Mn ; pressure Vědní obor RIV BM - Fyzika pevných látek a magnetismus CEP GA202/09/1027 GA ČR - Grantová agentura ČR CEZ AV0Z10100521 - FZU-D (2005-2011) AV0Z10100520 - FZU-D (2005-2011) UT WOS 000288660500024 DOI 10.1080/08957959.2010.529808 Anotace 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. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2012
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