The magnetic entropy change on amorphous FeMnZr alloys

被引：7

作者：

Min, S. G.

Kim, K. S.

Yu, S. C. ^{[1
]}

Kim, Y. C.

Kim, K. Y.

Lee, K. W.

Rhee, J. R.

Cha, S. Y.

Kim, Y. S.

机构：

[1] Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea

[2] Chungbuk Informat Technol Ctr, CBNU, BK 21, Cheongju 361763, South Korea

[3] Korea Inst Sci & Technol, Seoul 130650, South Korea

[4] Korea Res Inst Standard & Sci, Supercond Lab, Taejon 305600, South Korea

[5] Sookmyung Womens Univ, Dept Phys, Seoul 140742, South Korea

[6] POSCO Tech Res Labs, Elect Steel Res Team, Pohang 790785, South Korea

[7] Chungbuk Natl Univ, Sch Elect & COmp Engn, Cheongju 361763, South Korea

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 310卷 / 02期

关键词：

magnetocaloric effect; isothermal magnetization; amorphous ribbon;

D O I：

10.1016/j.jmmm.2006.10.968

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetization behaviors have been measured for amorphous Fe90-xMnxZr10 (x=0, 4, 6) alloys. The Curie temperature is decreased from 243 to 218K with increasing Mn concentration (x =0-6). The magnetization measurements were conducted at temperatures above the Curie temperature in the paramagnetic region. In all samples, the magnetic properties showed superparamagnetic behavior above Tc where the mean magnetic moment of the superparamagnetic spin clusters decreased with increasing temperature. A large magnetic entropy change DSM, which is calculated from H vs. M curves associated with the ferromagnetic-paramagnetic transitions in amorphous state, has been observed. The maximum of DSM was found to appear in the vicinity of the Curie temperature of the amorphous phase. The value is 2.96, 2.51 and 2.29 J/kg K at x = 0, 4 and 6, respectively. (C) 2006 Elsevier B. V. All rights reserved.

引用

页码：2820 / 2822

页数：3

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