Large magnetocaloric effects and thermal transport properties of La(FeSi)13 and their hydrides

被引：88

作者：

Fukamichi, K ^{[1
]}

Fujita, A ^{[1
]}

Fujieda, S ^{[1
]}

机构：

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

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 408卷

关键词：

itinerant-electron metamagnetic (IEM); magnetocaloric effects (MCEs); room temperature;

D O I：

10.1016/j.jallcom.2005.04.022

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：

La(FexSi1-x)(13) exhibit an itinerant-electron metamagnetic (IEM) transition at relatively low applied magnetic fields just above the Curie temperature T-C. Large magnetocaloric effects (MCEs) in terms of the isothermal temperature change Delta S-m and the adiabatic temperature change Delta T-ad are followed by the IEM transition. The MCEs increase, while T-C decreases with increasing Fe concentration. Therefore, T-C of these compounds should be controlled up to room temperature from the viewpoint of practical applications. The working temperature as magnetic refrigerants is extended from about 185 to 330 K by adjusting hydrogen concentration. After hydrogen absorption, the MCEs as well as the thermal conductivity of La(FexSi1-x)(13) and their hydrides exhibit excellent characteristics in the temperature range mentioned above. Consequently, the present compounds are one of the promising candidates for magnetic refrigerants working in a wide temperature range covering room temperature. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：307 / 312

页数：6

共 30 条

[1] Anomalously high entropy change in FeRh alloy [J].

Annaorazov, MP ;

Nikitin, SA ;

Tyurin, AL ;

Asatryan, KA ;

Dovletov, AK .

JOURNAL OF APPLIED PHYSICS, 1996, 79 (03) :1689-1695

[2] ACTIVE AND PASSIVE MAGNETIC REGENERATORS IN GAS MAGNETIC REFRIGERATORS [J].

BARCLAY, JA .

JOURNAL OF ALLOYS AND COMPOUNDS, 1994, 207 :355-361

[3] MAGNETIC HEAT PUMPING NEAR ROOM-TEMPERATURE [J].

BROWN, GV .

JOURNAL OF APPLIED PHYSICS, 1976, 47 (08) :3673-3680

[4] 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

[5] Thermal transport properties of magnetic refrigerants La(FexSi1-x)13 and their hydrides, and Gd5Si2Ge2 and MnAs [J].

Fujieda, S ;

Hasegawa, Y ;

Fujita, A ;

Fukamichi, K .

JOURNAL OF APPLIED PHYSICS, 2004, 95 (05) :2429-2431

[6] Large magnetocaloric effect in La(FexSi1-x)13 itinerant-electron metamagnetic compounds [J].

Fujieda, S ;

Fujita, A ;

Fukamichi, K .

APPLIED PHYSICS LETTERS, 2002, 81 (07) :1276-1278

[7] Giant isotropic magnetostriction of itinerant-electron metamagnetic La(Fe0.88Si0.12)13Hy compounds [J].

Fujieda, S ;

Fujita, A ;

Fukamichi, K ;

Yamazaki, Y ;

Iijima, Y .

APPLIED PHYSICS LETTERS, 2001, 79 (05) :653-655

[8] X-ray diffraction study in high magnetic fields of magnetovolume effect in itinerant-electron metamagnetic La(Fe0.88Si0.12)13 compound [J].

Fujita, A ;

Fukamichi, K ;

Koyama, K ;

Watanabe, K .

JOURNAL OF APPLIED PHYSICS, 2004, 95 (11) :6687-6689

[9] Large magnetovolume effects and band structure of itinerant-electron metamagnetic La(FexSi1-x)13 compounds -: art. no. 104431 [J].

Fujita, A ;

Fukamichi, K ;

Wang, JT ;

Kawazoe, Y .

PHYSICAL REVIEW B, 2003, 68 (10)

[10] 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

← 1 2 3 →