Low hysteretic magnetostructural transformation in Cr-doped Ni-Mn-Ga Heusler alloy
File(s)Cr_doped_V46 LFC.docx (2.75 MB)
Accepted version
Author(s)
Mendonça, Alberto Aguiar
Ghivelder, Luis
Bernardo, Pablo L
Cohen, Lesley F
Gomes, Angelo M
Type
Journal Article
Abstract
Ni-Mn-Ga based alloys are widely studied due to their potential for practical applications, making use of their martensitic transformations. However, hysteresis is a long-standing drawback that reduces the chance of transferring these alloys from the laboratory to industry. In this work, we studied a Cr-doped Ni2.15Mn0.70Cr0.15Ga alloy. We arrived at this composition by integrating data obtained from the previous phase and hysteresis diagrams taken from the literature. The compound presents a magnetostructural transition at room temperature, with a ferromagnetic martensite phase, and moderate thermal hysteresis of approximately 4 K. The magnetocaloric and ferromagnetic shape memory effects were explored, showing a reversible entropy change of approximately 9 Jkg-1K-1 under 0–5 T field change, and a cyclical magnetic-field-induced deformation close to 0.81% under 0–9 T, an advance towards high reversibility for this family alloys.
Date Issued
2023-03-25
Date Acceptance
2022-12-09
Citation
Journal of Alloys and Compounds, 2023, 938, pp.1-8
ISSN
0925-8388
Publisher
Elsevier
Start Page
1
End Page
8
Journal / Book Title
Journal of Alloys and Compounds
Volume
938
Copyright Statement
Copyright © 2022 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Engineering and Physical Sciences Research Council
Engineering & Physical Science Research Council (EPSRC)
Identifier
https://www.sciencedirect.com/science/article/pii/S0925838822048356
Grant Number
EP/P030548/1
EP/V042262/1
Subjects
Materials
0204 Condensed Matter Physics
0912 Materials Engineering
0914 Resources Engineering and Extractive Metallurgy
Publication Status
Published
Date Publish Online
2022-12-10