High Entropy Alloys: Magnetocaloric Effects

Alice Perrin; David E. Laughlin; Michael E. McHenry

doi:10.1016/B978-0-12-819726-4.00026-0

High Entropy Alloys: Magnetocaloric Effects

Alice Perrin, David E. Laughlin, Michael E. McHenry

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

7 Scopus citations

Abstract

This article reviews High Entropy Alloy (HEA) applications in magnetocaloric effect (MCE) based cooling. MCE is defined in the context of equilibrium thermodynamics with a magnetic work term We review mean field theory of the ferromagnetic to paramagnetic phase transition and its connection to pairwise Heisenberg exchange interactions and their distributions in disordered FCC alloys. 1st and 2nd (continuous) order phase transitions are illustrated. Methods to measure MCE are reviewed focusing on the role of distributed exchange interactions on the broadening of the magnetic phase transition and its connection with the refrigeration coefficient. HEA alloy systems studied for HEA are reviewed and future directions proposed.

Original language	English
Title of host publication	Encyclopedia of Materials
Subtitle of host publication	Metals and Alloys
Publisher	Elsevier
Pages	484-490
Number of pages	7
ISBN (Electronic)	9780128197264
ISBN (Print)	9780128197332
DOIs	https://doi.org/10.1016/B978-0-12-819726-4.00026-0
State	Published - Sep 1 2021
Externally published	Yes

Funding

The authors acknowledge support from the National Science Foundation (NSF) through Grant DMR-1709247. The authors also acknowledge use of the Data Storage Systems Center at CMU. We also acknowledge and thank Monica Sorescu (Duquesne Univ.) for data collection and analysis of Mӧssbauer spectroscopy.

Funders	Funder number
National Science Foundation	DMR-1709247

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10.1016/B978-0-12-819726-4.00026-0

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High Entropy Alloys: Magnetocaloric Effects

Abstract

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