Year: 2010
Type: article
Abstract: Compact polycrystalline samples of SrZn2Sb2 [space group $$ P\overline{3} m1 $$ , a = 4.503(1) Å, c = 7.721(1) Å] were prepared by spark plasma sintering. Thermoelectric performance, Hall effect, and magnetic properties were investigated in the temperature range from 2 K to 650 K. The thermoelectric figure of merit ZT was found to increase with temperature up to ZT = 0.15 at 650 K. At this temperature the material showed a high Seebeck coefficient of +230 μV K−1, low thermal conductivity of 1.3 W m−1 K−1, but rather low electrical conductivity of 54 S cm−1, together with a complex temperature behavior. SrZn2Sb2 is a diamagnetic p-type conductor with a carrier concentration of 5 × 1018 cm−3 at 300 K. The electronic structure was calculated within the density-functional theory (DFT), revealing a low density of states (DOS) of 0.43 states eV−1 cell−1 at the Fermi level.
Source: Journal of Electronic Materials
Authors: Hui Zhang, Mei-Bo Tang, Walter Schnelle, Michael Baitinger, Zhen-Yong Man, Hao-Hong Chen, Xin-Xin Yang, Jing-Tai Zhao, Yuri Grin
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,390
Award: G1640677382
OpenAlex ID: W2001555795