| Autor: |
Hui Zhang, Jing-Tai Zhao, Grin, Yu., Xiao-Jun Wang, Mei-Bo Tang, Zhen-Yong Man, Hao-Hong Chen, Xin-Xin Yang |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 10/28/2008, Vol. 129 Issue 16, p164713, 5p, 1 Diagram, 6 Graphs |
| Abstrakt: |
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 p3m space group with a=4.4932(7) Å and c=7.6170(10) Å. Antiferromagnetic ordering is detected at the Nèel temperature of 13.06 K, and the saturation magnetization reaches 6.87μB/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 cm3/C, proper carrier concentration of 2.77×1019/cm3, and high carrier mobility of 257 cm2/V s at 300 K. This compound shows high p-type Seebeck coefficient (+122 to +181 μV/K), low lattice thermal conductivity (1.60–0.40 W/m K), and high electrical conductivity (1137–524 S/cm). The obtained figure of merit and powder factor reach 0.92 and 20.72 μW/cm K2, respectively. The thermoelectric properties of EuZn2Sb2 are encouraging. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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