Počet záznamů: 1

Magnetic anisotropy of nonmodulated Ni-Mn-Ga martensite revisited

  1. 1.
    0348714 - FZU-D 2011 RIV US eng J - Článek v odborném periodiku
    Heczko, Oleg - Straka, L. - Novák, Václav - Fähler, S.
    Magnetic anisotropy of nonmodulated Ni-Mn-Ga martensite revisited.
    Journal of Applied Physics. Roč. 107, č. 9 (2010), 09A914/1-09A914/3 ISSN 0021-8979
    Grant ostatní:AV ČR(CZ) M100100913
    Výzkumný záměr: CEZ:AV0Z10100520
    Klíčová slova: magnetic anisotropy of non-modulated martensite * temperature dependence of anisotropy * Ni-Mn-Ga * adaptive martensite
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 2.064, rok: 2010
    http://jap.aip.org/resource/1/japiau/v107/i9/p09A914_s1

    Magnetic anisotropy of single crystal Ni50.5Mn30.4Ga19.1 having nonmodulated (NM) martensite structure (c=0.660 nm and b=a=0.547 nm at room temperature) was determined in the range of 10-300 K. The single variant microstructure needed for proper anisotropy determination was prepared by 40 MPa tensile stress in comparison with previous measurements where detwinned microstructure was obtained by compression. The tensile stress process yield the single variant microstructure with easy plane magnetic anisotropy and negligible second anisotropy constant in contrast of two anisotropy constants of the same order for compressed sample. The absolute value of anisotropy constant increases from 2.6x105 J/m3 at 300 K to 5x105 J/m3 at 10K.
    Trvalý link: http://hdl.handle.net/11104/0189156