A new type of thermoelectric material, EuZn2Sb2

被引：146

作者：

Zhang, Hui ^{[1
]}

Zhao, Jing-Tai ^{[1
]}

Grin, Yu. ^{[2
]}

Wang, Xiao-Jun ^{[1
]}

Tang, Mei-Bo ^{[1
]}

Man, Zhen-Yong ^{[1
]}

Chen, Hao-Hong ^{[1
]}

Yang, Xin-Xin ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

[2] Max Planck Inst Chem Phys Solid, D-01187 Dresden, Germany

来源：

JOURNAL OF CHEMICAL PHYSICS | 2008年 / 129卷 / 16期

基金：

中国博士后科学基金;

关键词：

D O I：

10.1063/1.3001608

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：

Polycrystalline EuZn2Sb2 is prepared by direct reaction of the elements. Its composition, structure, magnetism, heat capacity, and thermoelectric properties have been investigated. EuZn2Sb2 crystallizes in p (3) over barm space group with a=4.4932(7) angstrom and c=7.6170(10) angstrom. Antiferromagnetic ordering is detected at the Neel temperature of 13.06 K, and the saturation magnetization reaches 6.87 mu(B)/Eu at 2 K and 7 T. Eu ion has +2 valence. Its Hall effects are characterized by a high positive Hall coefficient of +0.226 cm(3)/C, proper carrier concentration of 2.77X10(19)/cm(3), and high carrier mobility of 257 cm(2)/V s at 300 K. This compound shows high p- type Seebeck coefficient (+ 122 to + 181 mu V/K), low lattice thermal conductivity (1.60-0.40 W/mK), and high electrical conductivity (1137-524 S/cm). The obtained figure of merit and powder factor reach 0.92 and 20.72 mu W/cm K-2, respectively. The thermoelectric properties of EuZn2Sb2 are encouraging. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3001608]

引用

页数：5

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