Structures, magnetic properties, and magnetocaloric effect in MnCo1-xGe (0.02≤x≤0.2) compounds

被引：32

作者：

Fang, Yi-Kun ^{[1
]}

Yeh, Jia-Chun ^{[2
]}

Chang, Wen-Cheng ^{[2
]}

Li, Xiu-Mei ^{[1
]}

Li, Wei ^{[1
]}

机构：

[1] Cent Iron & Steel Res Inst, Div Funct Mat Res, Beijing 100081, Peoples R China

[2] Natl Chung Cheng Univ, Dept Phys, Chiayi, Taiwan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2009年 / 321卷 / 19期

基金：

国家高技术研究发展计划(863计划);

关键词：

Intermetallic compound; Magnetocaloric effect; Magnetic refrigerant; METAMAGNETIC TRANSITION; PHASE-TRANSITIONS; ENTROPY CHANGE;

D O I：

10.1016/j.jmmm.2009.05.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crystalline structures, magnetic properties and magnetocaloric effect (MCE) of MnCo1-xGe alloys (0.02 <= x <= 0.2) have been reported. The crystalline structures of MnCo1-xGe (x <= 0.06) alloys are mainly of TiNiSi-type phase, and Ni2In-type structure dominates for x > 0.06. With decreasing Co concentrations the saturated magnetization of these compounds decreases. Larger low-field magnetic entropy change -Delta S-M of about 2.3 J/kg K in MnCo0.94Ge alloy has been obtained for a magnetic field change of 1 T. Moreover, it is found that TiNiSi-type phase exhibits larger -Delta S-M that Ni2In-type one. For MnCo0.94Ge alloy, considerable low-field refrigerant capacity (RC) (similar to 460 mJ/cm(3)), low coercivity and easy synthesis make these alloys potential candidates for near-room temperature magnetic refrigerants. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3053 / 3056

页数：4

共 20 条

[11] Giant magnetocaloric effect in Gd-5(Si2Ge2) [J].

Pecharsky, VK ;

Gschneidner, KA .

PHYSICAL REVIEW LETTERS, 1997, 78 (23) :4494-4497

[12] Some common misconceptions concerning magnetic refrigerant materials [J].

Pecharsky, VK ;

Gschneidner, KA .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (09) :4614-4622

[13] Magnetocaloric effect in Ho5Pd2:: Evidence of large cooling power [J].

Samanta, Tapas ;

Das, I. ;

Banerjee, S. .

APPLIED PHYSICS LETTERS, 2007, 91 (08)

[14] Negative magnetocaloric effect from highly sensitive metamagnetism in CoMnSi1-xGex [J].

Sandeman, K. G. ;

Daou, R. ;

Ozcan, S. ;

Durrell, J. H. ;

Mathur, N. D. ;

Fray, D. J. .

PHYSICAL REVIEW B, 2006, 74 (22)

[15] Transition-metal-based magnetic refrigerants for room-temperature applications [J].

Tegus, O ;

Brück, E ;

Buschow, KHJ ;

de Boer, FR .

NATURE, 2002, 415 (6868) :150-152

[16] Magnetocaloric effect near a second-order magnetic phase transition [J].

Tishin, A. M. ;

Derkach, A. V. ;

Spichkin, Y. I. ;

Kuz'min, M. D. ;

Chernyshov, A. S. ;

Gschneidner, K. A., Jr. ;

Pecharsky, V. K. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 310 (02) :2800-2804

[17]

Tishin AM, 1999, HANDB MAG M, V12, P395, DOI 10.1016/S1567-2719(99)12008-0

[18] Giant magnetocaloric effect of MnAs1-xSbx [J].

Wada, H ;

Tanabe, Y .

APPLIED PHYSICS LETTERS, 2001, 79 (20) :3302-3304

[19] Vacancy induced structural and magnetic transition in MnCo1-xGe [J].

Wang, Jian-Tao ;

Wang, Ding-Sheng ;

Chen, Changfeng ;

Nashima, O. ;

Kanomata, T. ;

Mizuseki, H. ;

Kawazoe, Y. .

APPLIED PHYSICS LETTERS, 2006, 89 (26)

[20] METAMAGNETIC TRANSITION AND SUSCEPTIBILITY MAXIMUM IN AN ITINERANT-ELECTRON SYSTEM [J].

YAMADA, H .

PHYSICAL REVIEW B, 1993, 47 (17) :11211-11219

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