2003/02/18 by V. V. Khovailo, Katsunari Oikawa, K. Oikawa +4 · 1 citation
Materials Science · Physics and Astronomy · #Shape Memory Alloy Transformations #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.1556218
published as J. Appl. Phys. 93 (2003), p. 8483 · presented at MMM-47, to be published in J. Appl. Phys. (May 15, 2003)
arxiv created 2003/02/18 · openalex publication_date 2003/05/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The entropy change ΔS between the high-temperature cubic phase and the low-temperature tetragonally based martensitic phase of Ni2+xMn1−xGa (x=0–0.20) alloys was studied. The experimental results obtained indicate that ΔS in the Ni2+xMn1−xGa alloys increases with the Ni excess x. The increase of ΔS is presumably accounted for by an increase of magnetic contribution to the entropy change. It is suggested that the change in modulation of the martensitic phase of Ni2+xMn1−xGa results in discontinuity of the composition dependence of ΔS.