Magnetic properties and magnetic-entropy change of MnFeP0.5As0.5-xSix(x=0-0.3) compounds

被引：48
作者：
Dagula, W.
Tegus, O.
Li, X. W.
Song, L.
Bruck, E.
Thanh, D. T. Cam
de Boer, F. R.
Buschow, K. H. J.
机构：
[1] Univ Amsterdam, Van der Waals Zeeman Inst, NL-1018 XE Amsterdam, Netherlands
[2] Inner Mongolia Normal Univ, Key Lab Magnet Mat, Hohhot 010022, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2006年 / 99卷 / 08期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2158969
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The effects of Si substitution for As on the magnetic and magnetocaloric properties of MnFeP0.5As0.5-xSix compounds have been investigated. The Si-substituted compounds MnFeP0.5As0.5-xSix with x=0, 0.1, 0.2, and 0.3 have been prepared by high-energy ball milling and solid-state reaction. X-ray diffraction shows that all the MnFeP0.5As0.5-xSix compounds crystallize in the Fe2P-type structure. Magnetic measurements show that the compounds are ferromagnetic with a nonlinear dependence of T-C on Si content. All compounds exhibit a field-induced first-order magnetic phase transition. The magnetic-entropy change is derived from the magnetization data by using the Maxwell relations. The maximum magnetic-entropy change observed in this system reaches about 32 J/kg K for a field change from 0 to 2 T for x=0.2, at temperature around 294 K. (C) 2006 American Institute of Physics.
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共 10 条
[1]   Magnetocaloric effects in MnFeP1-xAsx-based compounds [J].
Brück, E ;
Ilyn, M ;
Tishin, AM ;
Tegus, O .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2005, 290 :8-13
[2]   Magnetic refrigeration near room temperature with Fe2P-based compounds [J].
Brück, E ;
Tegus, O ;
Zhang, L ;
Li, XW ;
de Boer, FR ;
Buschow, KHJ .
JOURNAL OF ALLOYS AND COMPOUNDS, 2004, 383 (1-2) :32-36
[3]   Permanent magnet applications [J].
Coey, JMD .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2002, 248 (03) :441-456
[4]   Itinerant-electron metamagnetic transition and large magnetocaloric effects in La(FexSi1-x)13 compounds and their hydrides -: art. no. 104416 [J].
Fujita, A ;
Fujieda, S ;
Hasegawa, Y ;
Fukamichi, K .
PHYSICAL REVIEW B, 2003, 67 (10)
[5]  
LEE SJ, 2002, J APPL PHYS, V91, P8543
[6]   Giant magnetocaloric effect in Gd-5(Si2Ge2) [J].
Pecharsky, VK ;
Gschneidner, KA .
PHYSICAL REVIEW LETTERS, 1997, 78 (23) :4494-4497
[7]   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
[8]   Giant magnetocaloric effect of MnAs1-xSbx [J].
Wada, H ;
Tanabe, Y .
APPLIED PHYSICS LETTERS, 2001, 79 (20) :3302-3304
[9]   Neutron diffraction study of history dependence in MnFeP0.6Si0.4 [J].
Zhang, L ;
Moze, O ;
Prokes, K ;
Tegus, O ;
Brücka, E .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2005, 290 :679-681
[10]   Magnetocaloric effect in La0.67Ca0.33MnO delta and La0.60Y0.07Ca0.33MnO delta bulk materials [J].
Zhang, XX ;
Tejada, J ;
Xin, Y ;
Sun, GF ;
Wong, KW ;
Bohigas, X .
APPLIED PHYSICS LETTERS, 1996, 69 (23) :3596-3598
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