Spontaneous generation of voltage in the magnetocaloric compound La(Fe0.88Si0.12)13 and comparison to SmMn2Ge2

被引：13
作者：
Zou, M. [1 ]
Sampaio, J. A. [1 ]
Pecharsky, V. K. [1 ,2 ]
Gschneidner, K. A., Jr. [1 ,2 ]
机构：
[1] Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA
[2] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA
来源：
PHYSICAL REVIEW B | 2009年 / 80卷 / 17期
关键词：
iron compounds; lanthanum compounds; magnetic transitions; magnetocaloric effects; manganese compounds; samarium compounds;
D O I：
10.1103/PhysRevB.80.172403
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Relationships among spontaneous generation of voltage (SGV), magnetocaloric effect, temperature induced first-order magnetic phase transformation, and its thermal effect have been studied based on experimental results of La(Fe0.88Si0.12)(13) and SmMn2Ge2 compounds. Remarkable differences in magnetocaloric effects and temperature-induced unit-cell volume changes during their first-order magnetic phase transformations lead to dramatic differences in their SGV effects. Both temperature and magnetic field trigger SGV in La(Fe0.88Si0.12)(13) compound, but no SGV has been observed in SmMn2Ge2. Our results clarify that it is not the first-order crystallographic or magnetic phase transformation per se, but the strong thermal effects, i.e., latent heat and magnetocaloric effect that play the key role in the SGV mechanism.
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页数：4
相关论文
共 14 条
[1]   MAGNETIC-PROPERTIES OF SMMN2GE2 COMPOUNDS [J].
DURAJ, M ;
DURAJ, R ;
SZYTULA, A ;
TOMKOWICZ, Z .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1988, 73 (02) :240-246
[2]   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
[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]   SPONTANEOUS EMF ASSOCIATED WITH SHAPE MEMORY EFFECT IN TINI [J].
JOHNSON, AD ;
KATZ, PI .
JOURNAL OF APPLIED PHYSICS, 1977, 48 (01) :73-74
[5]  
KOKORIN VV, 1985, FIZ MET METALLOVED+, V60, P285
[6]  
KOVAL YN, 1980, FIZ MET METALLOVED+, V49, P1099
[7]   Magnetocaloric and structural properties of SmMn2Ge2 [J].
Koyama, K ;
Miura, S ;
Okada, H ;
Shigeoka, T ;
Fujieda, S ;
Fujita, A ;
Fukamichi, K ;
Watanabe, K .
JOURNAL OF ALLOYS AND COMPOUNDS, 2006, 408 :118-121
[8]   Spontaneous generation of voltage in Gd5(SixGe4-x) during a first-order phase transition induced by temperature or magnetic -: art. no. 174110 [J].
Levin, EM ;
Pecharsky, VK ;
Gschneidner, KA .
PHYSICAL REVIEW B, 2001, 63 (17)
[9]   The giant magnetocaloric effect of optimally prepared Gd5Si2Ge2 [J].
Pecharsky, AO ;
Gschneidner, KA ;
Pecharsky, VK .
JOURNAL OF APPLIED PHYSICS, 2003, 93 (08) :4722-4728
[10]   Structure, magnetism, and thermodynamics of the novel rare earth-based R5T4 intermetallics [J].
Pecharsky, V. K. ;
Gschneidner, K. A., Jr. .
PURE AND APPLIED CHEMISTRY, 2007, 79 (08) :1383-1402
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