Low hysteretic magnetostructural transformation in Cr-doped Ni-Mn-Ga Heusler alloy

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Title: Low hysteretic magnetostructural transformation in Cr-doped Ni-Mn-Ga Heusler alloy
Authors: Mendonça, AA
Ghivelder, L
Bernardo, PL
Cohen, LF
Gomes, AM
Item 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.
Issue Date: 25-Mar-2023
Date of Acceptance: 9-Dec-2022
URI: http://hdl.handle.net/10044/1/101309
DOI: https://doi.org/10.1016/j.jallcom.2022.168444
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/Funder: Engineering and Physical Sciences Research Council
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/P030548/1
Keywords: Materials
0204 Condensed Matter Physics
0912 Materials Engineering
0914 Resources Engineering and Extractive Metallurgy
Publication Status: Published
Embargo Date: 2023-12-09
Online Publication Date: 2022-12-10
Appears in Collections:Experimental Solid State

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