Magnetocaloric effect in spherical La(FexSi1-x)13 and their hydrides for active magnetic regenerator-type refrigerator

被引：36

作者：

Fujita, A. ^{[1
]}

Koiwai, S.

Fujieda, S. ^{[1
]}

Fukamichi, K. ^{[2
]}

Kobayashi, T. ^{[3
]}

Tsuji, H. ^{[3
]}

Kaji, S. ^{[3
]}

Saito, A. T. ^{[3
]}

机构：

[1] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Aoba Yama 02, Sendai, Miyagi 9808579, Japan

[2] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

[3] Toshiba Co Ltd, Corp Res & Dev Ctr, Kawasaki, Kanagawa 2128582, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 07期

关键词：

TRANSITION;

D O I：

10.1063/1.3070658

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have fabricated spherical La(FexSi1-x)(13) compounds by a rotating electrode process (REP) to provide suitable refrigerants for active magnetic regenerator (AMR)-type systems. In the as-prepared state, the cross section exhibits a dendritic metallographic structure composed of two phases of alpha-Fe-based alloy with Si and LaFeSi equiatomic compound. After annealing at 1323 K for 5 days, the spheres become a single phase of La(FexSi1-x)(13). From the temperature dependence of magnetic entropy change for the hydrogenated spheres, it has been confirmed that the hydrogen concentration in the spheres is homogeneous. In addition, it has also been demonstrated that the itinerant-electron metamagnetic transition appears in the spheres with the higher Fe concentration. Consequently, the spherical La(FexSi1-x)(13) fabricated by the REP are suitable for AMR-type refrigerations. (c) 2009 American Institute of Physics. [DOI: 10.1063/1.3070658]

引用

页数：3

共 14 条

[1]

[Anonymous], 2003, MATER TODAY

[2] Large magnetocaloric effects in NaZn13-type La(FexSi1-x)13 compounds and their hydrides composed of icosahedral clusters [J].

Fujieda, S. ;

Fujita, A. ;

Fukamichi, K. .

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, 2003, 4 (04) :339-346

[3] Itinerant-electron metamagnetic transition and large magnetovolume effects in La(FexSi1-x)13 compounds -: art. no. 014410 [J].

Fujita, A ;

Fujieda, S ;

Fukamichi, K ;

Mitamura, H ;

Goto, T .

PHYSICAL REVIEW B, 2002, 65 (01) :144101-144106

[4] Itinerant electron metamagnetic transition in La(FexSi1-x)13 intermetallic compounds [J].

Fujita, A ;

Akamatsu, Y ;

Fukamichi, K .

JOURNAL OF APPLIED PHYSICS, 1999, 85 (08) :4756-4758

[5] 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)

[6] Active magnetic regeneration behavior of spherical hydrogenated La(Fe0.86Si0.14)13 fabricated by rotating electrode process [J].

Fujita, Asaya ;

Koiwai, Sadayoshi ;

Fujieda, Shun ;

Fukamichi, Kazuaki ;

Kobayashi, Tadahiko ;

Tsuji, Hideyuki ;

Kaji, Shiori ;

Saito, Akiko Takahashi .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2007, 46 (8-11) :L154-L156

[7] Rapidly solidified La(Fe1-xSix)13 alloys and their magnetocaloric properties [J].

Hirosawa, Satoshi ;

Tomizawa, Hiroyuki ;

Bekki, Katsunori .

IEEE TRANSACTIONS ON MAGNETICS, 2006, 42 (10) :3608-3610

[8] La(Fe,Si)13-based magnetic refrigerants obtained by novel processing routes [J].

Lyubina, Julia ;

Gutfleisch, Oliver ;

Kuz'min, Michael D. ;

Richter, Manuel .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2008, 320 (18) :2252-2258

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

Pecharsky, VK ;

Gschneidner, KA .

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

[10] 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

← 1 2 →