Multi-site exchange enhanced barocaloric response in Mn3NiN
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Published version
Supporting information
Author(s)
Type
Journal Article
Abstract
We study the barocaloric effect (BCE) in the geometrically frustrated antiferromagnet Mn3NiN across the Néel transition temperature. Experimentally, we find a larger barocaloric entropy change by a factor of 1.6 than that recently discovered in the isostructural antiperovskite Mn3GaN despite significantly greater magnetovolume coupling in Mn3GaN. By fitting experimental data to theory, we show that the larger BCE of Mn3NiN originates from multisite exchange interactions amongst the local Mn magnetic moments and their coupling with itinerant electron spins. Using this framework, we discuss the route to maximize the BCE in the wider Mn3AN family.
Date Issued
2018-11-28
Date Acceptance
2018-10-22
Citation
Physical Review X, 2018, 8
ISSN
2160-3308
Publisher
American Physical Society
Journal / Book Title
Physical Review X
Volume
8
Copyright Statement
© 2018 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation,
and DOI.
and DOI.
Sponsor
Engineering & Physical Science Research Council (E
Grant Number
RG81276
Subjects
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
TRANSITION
Publication Status
Published
Article Number
041035