A Short Review of Magnetocaloric Effect in Ni-Mn-Ga Heusler Alloy System

D. Pal¹

1. Department of Physics, Gokhale Memorial Girls’ College, Kolkata-700020, India.

Section:Review Paper, Product Type: Journal-Paper
Vol.11 , Issue.3 , pp.13-20, Jun-2023

Online published on Jun 30, 2023

Copyright © D. Pal . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
Magnetic refrigeration that utilizes the magnetocaloric effect (MCE) of a material is considered a promising substitute to the conventional gas-compression/expansion cooling technology owing to its advantages, such as environmental friendliness, cost-effectiveness, etc. For the potential application of this technology, low-cost and highly efficient magnetocaloric materials are in great need as magnetic refrigerants. The geometry of the magnetocaloric materials also becomes important for cooling in (nano)macro devices and it demands a very small size. In search of prospective magnetocaloric material Ni-Mn-based ferromagnetic Heulser alloys are of great interest for their potential to achieve large/giant magnetic entropy change at magneto-structural transition. This review article comprises an overview of the magnetocaloric effect in the ferromagnetic Ni-Mn-Ga Heusler alloy system. MCE in these alloys in various low/reduced dimensions such as ribbons, microwires and thin films are also outlined. Recent development in this field along with previous works have been reviewed in a systematic manner. The present difficulties/limitations and remaining challenges in this field have also been discussed in this article.

Key-Words / Index Term :
Heusler alloy, Martensitic transition, Magnetic entropy, Magnetocaloric effect, Microwires, Ribbons, Thin films.

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