Antimonides with the half-Heusler structure: New thermoelectric materials

K. Mastronardi, D. Young, C. C. Wang, P. Khalifah, R. J. Cava, A. P. Ramirez

Research output: Contribution to journalArticlepeer-review

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Abstract

The thermoelectric properties near ambient temperature of half-Heusler alloys based on LnPdSb, where Ln=Ho, Er, and Dy are reported. The Seebeck coefficients are large, between 60 and 250 μV/K, and the materials are p type. The resistivities are between 0.6 and 20 mΩcm. Thermal conductivities are between approximately 5.0 and 3.5 W/mK at 300 K, and are smallest in intentionally disordered materials. The highest ambient temperature ZT obtained is 0.06. Band-structure calculations are presented for LuPdSb. It is suggested that half-Heusler alloys with 18 electrons per formula unit may represent a large class of thermoelectric materials.

Original languageEnglish (US)
Pages (from-to)1415-1417
Number of pages3
JournalApplied Physics Letters
Volume74
Issue number10
DOIs
StatePublished - Mar 8 1999

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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