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Journal of Electronic Materials

, Volume 39, Issue 9, pp 1772–1776

First Online: 23 March 2010Received: 24 July 2009Accepted: 22 February 2010

Abstract

Compact polycrystalline samples of SrZn2Sb2 space group \ P\overline{3} m1 \, a = 4.5031 Å, c = 7.7211 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, low thermal conductivity of 1.3 W m K, but rather low electrical conductivity of 54 S cm, together with a complex temperature behavior. SrZn2Sb2 is a diamagnetic p-type conductor with a carrier concentration of 5 × 10 cm 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 cell at the Fermi level.

KeywordsSrZn2Sb2 Thermoelectric performance Hall effect magnetic properties  Download to read the full article text



Autor: Hui Zhang - Mei-Bo Tang - Walter Schnelle - Michael Baitinger - Zhen-Yong Man - Hao-Hong Chen - Xin-Xin Yang - Jing-Tai Zh

Fuente: https://link.springer.com/







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