Magnetism and large reversible room-temperature magnetocaloric properties of antiperovskite compounds ZnC1-xNxFe3-2xMn2x (0 ≤ x ≤ 1)

被引：4

作者：

Lin, S. ^{[1
]}

Wang, B. S. ^{[1
]}

Tong, P. ^{[1
]}

Huang, Y. N. ^{[1
]}

Lu, W. J. ^{[1
]}

Zhao, B. C. ^{[1
]}

Song, W. H. ^{[1
]}

Sun, Y. P. ^{[1
,2
]}

机构：

[1] Acad Sinica, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

[2] Chinese Acad Sci, High Field Magnet Lab, Hefei 230031, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 572卷

基金：

中国国家自然科学基金;

关键词：

Antiperovskite; Dual doping; Magnetocaloric effect; Magnetism; REFRIGERATION; MANGANESE; TRANSITION; AL;

D O I：

10.1016/j.jallcom.2013.03.090

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper we report the effects of Mn substitution on the structural and magnetic properties of ZnCFe3-yMny (0 <= y <= 1). It is found that with increasing the doping level y the increased lattice constant, enhanced Curie temperature (T-C), and decreased saturated magnetization (M-S) are obtained. However, the enhancement of T-C (>380 K) in ZnCFe3-yMny is not suitable to explore room-temperature magnetocaloric material. Therefore, we carry out a dual doping by N and Mn on C and Fe sites of ZnCFe3, respectively. As a result, with increasing x the lattice parameter increases while the T-C and M-S decrease gradually for ZnC1-xNxFe3-2xMn2x (0 <= x <= 1). In particular, for ZnC0.5N0.5Fe2Mn (x = 0.5) the T-C (similar to 302 K) is tuned just at the room temperature. Correspondingly, around the T-C of ZnC0.5N0.5Fe2Mn the magnetocaloric effect is considerably large with a magnetic entropy change of 2.86 J/kg K (Delta H = 4.5 T) as well as a relative cooling power (RCP) of 220 J/kg (Delta H = 4.5 T). Given the considerably large RCP, inexpensive and innoxious raw materials, and suitable operating temperature, ZnC0.5N0.5Fe2Mn is suggested to be a promising candidate for room-temperature magnetic refrigeration. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：145 / 149

页数：5

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