Large and reversible inverse magnetocaloric effect in Ni48.1Co2.9Mn35.0In14.0 metamagnetic shape memory microwire

被引：34

作者：

Qu, Y. H. ^{[1
]}

Cong, D. Y. ^{[1
]}

Chen, Z. ^{[1
]}

Gui, W. Y. ^{[1
]}

Sun, X. M. ^{[1
]}

Li, S. H. ^{[1
]}

Ma, L. ^{[2
]}

Wang, Y. D. ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, 30 Xueyuan Rd, Beijing 100083, Peoples R China

[2] Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2017年 / 111卷 / 19期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

GIANT; TRANSITION;

D O I：

10.1063/1.5000450

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High-performance magnetocaloric materials should have a large reversible magnetocaloric effect and good heat exchange capability. Here, we developed a Ni48.1Co2.9Mn35.0In14.0 metamagnetic shape memory microwire with a large and reversible inverse magnetocaloric effect. As compared to the bulk counterpart, the microwire shows a better combination of magnetostructural transformation parameters (magnetization difference across transformation Delta M, transformation entropy change Delta S-tr, thermal hysteresis Delta T-hys, and transformation interval Delta T-int) and thus greatly reduced critical field required for complete and reversible magnetic-field-induced transformation. A strong and reversible metamagnetic transition occurred in the microwire, which facilitates the achievement of large reversible magnetoresponsive effects. Consequently, a large and reversible magnetic-field-induced entropy change Delta S-m of 12.8 J kg(-1) K-1 under 5 T was achieved in the microwire, which is the highest value reported heretofore in Ni-Mn-based magnetic shape memory wires. Furthermore, since microwires have a high surface/volume ratio, they exhibit very good heat exchange capability. The present Ni48.1Co2.9Mn35.0In14.0 microwire shows great potential for magnetic refrigeration. This study may stimulate further development of high-performance magnetocaloric wires for high-efficiency and environmentally friendly solid-state cooling. Published by AIP Publishing.

引用

页数：5

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