Počet záznamů: 1  

Enhanced magnetic hysteresis in Ni-Mn-Ga single crystal and its influence on magneticshape memory effect

  1. 1.
    0454555 - FZÚ 2016 RIV US eng J - Článek v odborném periodiku
    Heczko, Oleg - Drahokoupil, Jan - Straka, L.
    Enhanced magnetic hysteresis in Ni-Mn-Ga single crystal and its influence on magneticshape memory effect.
    Journal of Applied Physics. Roč. 117, č. 17 (2015), "17E703-1"-"17E703-4". ISSN 0021-8979
    Grant CEP: GA ČR(CZ) GAP107/11/0391
    Institucionální podpora: RVO:68378271
    Klíčová slova: field-induced strain * temperature-dependence * alloy * martensite * Ni2MnGa * anisotropy
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 2.101, rok: 2015

    Enhanced magnetic hysteresis due to boron doping in combination with magnetic shape memory effect in Ni-Mn-Ga single crystal results in new interesting functionality of magnetic shape memory (MSM) alloys such as mechanical demagnetization. In Ni50.0Mn28.5Ga21.5 single crystal, the boron doping increased magnetic coercivity from few Oe to 270 Oe while not affecting the transformation behavior and 10 M martensite structure. However, the magnetic field needed for MSM effect also increased in doped sample. The magnetic behavior is compared to undoped single crystal of similar composition. The evidence from the X-ray diffraction, magnetic domain structure, magnetization loops, and temperature evolution of the magnetic coercivity points out that the enhanced hysteresis is caused by stress-induced anisotropy.

    Trvalý link: http://hdl.handle.net/11104/0255218