Systematic trends of transformation temperatures and crystal structure of Ni-Mn-Ga-Fe-Cu alloys

0534545 - FZÚ 2021 RIV CH eng J - Journal Article
Armstrong, Andrew - Nilsén, Frans - Rameš, Michal - Colman, R.H. - Veřtát, Petr - Kmječ, T. - Straka, Ladislav - Müllner, P. - Heczko, Oleg
Systematic trends of transformation temperatures and crystal structure of Ni-Mn-Ga-Fe-Cu alloys.
Shape Memory and Superelasticity. Roč. 6, č. 1 (2020), s. 97-106. ISSN 2199-384X. E-ISSN 2199-3858
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR GA16-00043S; GA MŠMT(CZ) LM2018096
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : Ni-Mn-Ga-Fe-Cu alloys * transformation temperature * MSM alloys
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Method of publishing: Limited access
https://doi.org/10.1007/s40830-020-00273-3

Here we report a systematic research on effects of Fe and Cu upon properties relevant for the magnetic shape memory effect of Ni–Mn–Ga ferromagnetic shape memory alloys. Fe and Cu were identified as elements with potential synergism to increase the martensite transformation temperature of Ni–Mn–Ga magnetic shape memory (MSM) alloys. Eighteen Ni–Mn–Ga–Fe–Cu alloys with different systematic trends in substituting the ternary elements with Cu and Fe have been investigated. We found a method to describe the effectiveness of Ni, Mn, and Cu upon raising the martensitic transformation temperature, lowering the saturation magnetization, and varying the Curie temperature. We find the martensite transformation temperature most influenced by the Ni content, followed by Mn, with a smaller effect of Cu. The saturation magnetization decreases with similar coefficients for Mn and Cu alloying.
Permanent Link: http://hdl.handle.net/11104/0312728