Year: 2013
Type: article
Abstract: Low temperature (<400 K) thermoelectric properties of semiconducting RuIn3 and metallic IrIn3 are reported. RuIn3 is a narrow band gap semiconductor with a large n-type Seebeck coefficient at room temperature (S(290K)≈−400μV/K), but the thermoelectric figure of merit (ZT(290K)≈0.007) is small because of high electrical resistivity and thermal conductivity (κ(290 K) ∼ 2.0 W/m K). IrIn3 is a metal (n(290K)≈1021cm−3) with low thermopower at room temperature (S(290K)≈−20μV/K). Iridium substitution on the ruthenium site has a dramatic effect on transport properties, which leads to a large improvement in the power factor (S2ρ(390K)∼−207μWm K2) and corresponding figure of merit (ZT(380 K) = 0.053), improving the efficiency of the material by almost an order of magnitude.
Source: Journal of Applied Physics
DOI: 10.1063/1.4793493
Authors: N. Haldolaarachchige, W. A. Phelan, Y. M. Xiong, R. Jin, J. Y. Chan, S. Stadler, D. P. Young
Institution: Louisiana State University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Awards: Manifestations of Broken Symmetry in Transition-Metal Layered Compounds: Surface vs. Bulk Properties, Strongly Correlated Electron Behavior in Intermetallics with an Emphasis on Novel Borides, Carbides, and Noncentrosymmetric Systems, CAREER: Seeking Half-Metallic Alloys, Crystal Growth of Intermetallics with Competing Magnetic Interactions
OpenAlex ID: W1976040696