Dependence of martensite transformation temperature on magnetic field in Ni.sub.2./sub.MnGa and Ni.sub.2./sub.MnGa.sub.0.95./sub.In.sub.0.05./sub. single crystals

0558400 - FZÚ 2023 RIV NL eng J - Journal Article
Cejpek, P. - Proschek, P. - Straka, Ladislav - Heczko, Oleg
Dependence of martensite transformation temperature on magnetic field in Ni₂MnGa and Ni₂MnGa_0.95In_0.05 single crystals.
Journal of Alloys and Compounds. Roč. 908, July (2022), č. článku 164514. ISSN 0925-8388. E-ISSN 1873-4669
R&D Projects: GA ČR GA19-09882S; GA MŠMT(CZ) LM2018096
Institutional support: RVO:68378271
Keywords : Ni-Mn-Ga * magnetic shape memory * martensitic transformation * transformation temperatures
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 6.2, year: 2022
Method of publishing: Limited access
https://doi.org/10.1016/j.jallcom.2022.164514

The shift of martensite transformation temperatures with magnetic field is an essential parameter for magnetic shape memory effect as well as for magnetocalorics. We compare the dependence of martensite transformation temperature on magnetic field in Ni2MnGa and Ni2MnGa0.95In0.05 single crystals. Choosing the stoichiometric and isoelectronic compound enables to observe the effect of In alloying free from the influence of off-stoichiometry. The martensite start temperature, Ms, decreases several kelvins in low magnetic fields (< 1 T). In high field (> 2 T), Ms increases with the magnetic field and the Ms(H) dependence is about linear with the slope of 0.26 K/T (Ni2MnGa) and 0.36 K/T (Ni2MnGa0.95In0.05).

Permanent Link: https://hdl.handle.net/11104/0333920