Half-metallic perovskite superlattices with colossal thermoelectric figure of merit

M. Upadhyay Kahaly, K. Ozdogan, Udo Schwingenschlögl

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Nowadays heavy experimental efforts are focussed on doped oxide thermoelectrics to increase the thermopower and thermoelectric performance. We propose a high thermoelectric figure of merit for half-metallic SrTi1−xCoxO3 (x = 0, 0.125, 0.25, 0.375, and 0.5) in a superlattice with SrTiO3, which is stable at high temperatures and in an oxygen environment. The maximal value of Z hardly depends on the doping, while the temperature at which the maximum occurs increases with the Co concentration. The easy tunability from being an insulator to a half-metal under substitutional doping combined with the colossal figure of merit opens up great potential in the emerging field of spin-caloritronics.
Original languageEnglish (US)
Pages (from-to)8406
JournalJournal of Materials Chemistry A
Volume1
Issue number29
DOIs
StatePublished - May 9 2013

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