Multisite Exchange-Enhanced Barocaloric Response in Mn3NiN

被引：59

作者：

Boldrin, David ^{[1
]}

Mendive-Tapia, Eduardo ^{[2
]}

Zemen, Jan ^{[3
]}

Staunton, Julie B. ^{[2
]}

Hansen, Thomas ^{[4
]}

Aznar, Araceli ^{[5
,6
]}

Tamarit, Josep-Lluis ^{[5
,6
]}

Barrio, Maria ^{[5
,6
]}

Lloveras, Pol ^{[5
,6
]}

Kim, Jiyeob ^{[7
]}

Moya, Xavier ^{[7
]}

Cohen, Lesley F. ^{[1
]}

机构：

[1] Imperial Coll London, Dept Phys, Blackett Lab, London SW7 2AZ, England

[2] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[3] Czech Tech Univ, Fac Elect Engn, Tech 2, Prague 16627, Czech Republic

[4] Inst Laue Langevin, CS 20156, F-38042 Grenoble 9, France

[5] Univ Politecn Cataluna, Dept Fis, EEBE, Campus Diagonal Besos,Eduard Maristany 10-14, Barcelona 08019, Catalonia, Spain

[6] Univ Politecn Cataluna, Barcelona Res Ctr Multiscale Sci & Engn, Campus Diagonal Besos,Eduard Maristany 10-14, Barcelona 08019, Catalonia, Spain

[7] Univ Cambridge, Dept Mat Sci, Cambridge CB3 0FS, England

来源：

PHYSICAL REVIEW X | 2018年 / 8卷 / 04期

基金：

英国工程与自然科学研究理事会; 欧洲研究理事会;

关键词：

TRANSITION;

D O I：

10.1103/PhysRevX.8.041035

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the barocaloric effect (BCE) in the geometrically frustrated antiferromagnet Mn3NiN across the Neel 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 Mn(3)AN family.

引用

页数：7

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