Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 129, Issue 16, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3001608
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Funding
- SICCAS and MPI-CPfS
- China Postdoctoral Science Foundation [20070410741]
- National Basic Research Program of China [2007CB607503]
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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]
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