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Exploration of room-temperature magnetocaloric effect in nanogranular Ni–Cr thin films.

Exploration of room-temperature magnetocaloric effect in nanogranular Ni–Cr thin films.

Authors :
Alman, Vidya
Ramakrishna, V. V.
Battula, Sai Vittal
Sahu, B. N.
Annadi, Anil
Singh, Vidyadhar
Bohra, Murtaza
Source :
MRS Communications; Feb2023, Vol. 13 Issue 1, p117-120, 4p
Publication Year :
2023

Abstract

From multicomponent high-entropy alloys (AlCoCrFeNi) through ternary alloys (CrFeNi) to binary (NiCr) alloys, Cr doping plays a critical role in altering the magnetocaloric properties of the resultant alloys. Magnetocaloric effect (MCE) of Ni<subscript>100−x</subscript>Cr<subscript>x</subscript> (x = 5, 10, 15 at.%) nanogranular thin films were investigated by varying Cr concentration, which demonstrate near room-temperature magnetic entropy change (− ΔS<subscript>M</subscript> = 0.08 J/kg K) and relative cooling power (RCP = 25 J/kg) at 10 at.% Cr. The MCE properties are well predicted using a phenomenological model based on magnetization as a function of temperature, and they correlate well with experimentally measured magnetic isotherms. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
21596859
Volume :
13
Issue :
1
Database :
Complementary Index
Journal :
MRS Communications
Publication Type :
Academic Journal
Accession number :
162114401
Full Text :
https://doi.org/10.1557/s43579-023-00321-w