Magnetocrystalline anisotropy of Ni-Mn-Ga-Co-Cu martensite

0566470 - FZÚ 2023 RIV CZ eng K - Conference Paper (Czech conference)
Rameš, Michal - Straka, Ladislav - Sozinov, A. - Heczko, Oleg
Magnetocrystalline anisotropy of Ni-Mn-Ga-Co-Cu martensite.
Sborník příspěvků 11. Studentské vědecké konference fyziky pevných látek a materiálů. Praha: České vysoké učení technické, 2022 - (Celbová, L.; Dráb, M.; Kalvoda, L.; Kolenko, P.; Kučeráková, M.; Zoubkov, K.), s. 38-42. ISBN 978-80-01-07079-6.
[Studentská vědecká konference fyziky pevných látek a materiálů /11./. Praha (CZ), 12.09.2022-15.09.2022]
R&D Projects: GA ČR(CZ) GA21-06613S; GA MŠMT(CZ) LM2018096
Institutional support: RVO:68378271
Keywords : martensite * magnetocrystalline anisotropy * Heusler alloys * Ni-Mn-Ga
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)

The martensites of Heusler alloys based on Ni-Mn-Ga exhibit magnetically-induced reorientation resulting in giant field-induced strain. Up to 12% strain was observed in Ni-Mn-Ga-Co-Cu with 4 at.% of Co and Cu. The driving force of the phenomenon is the magnetocrystalline anisotropy. We studied evolution of the anisotropy with temperature and compositions using magnetiyation curve measurements in four different single crystalline Ni-Mn-Ga-Co-Cu and compared with non-doped Ni-Mn-Ga. The anisotropy of martensite decreases with increasing average doping (Co+Cu)/2 but it does not scale with tetragonal ratio or valence electron concentration.
Permanent Link: https://hdl.handle.net/11104/0337801