Thermal conductivity reduction in oxygen-deficient strontium titanates

Choongho Yu, Matthew L. Scullin, Mark Huijben, Ramamoorthy Ramesh, Arun Majumdar

Research output: Contribution to journalArticleAcademic

91 Citations (Scopus)

Abstract

We report significant thermal conductivity reduction in oxygen-deficient lanthanum-doped strontium titanate (Sr1−xLaxTiO3−δ) films as compared to unreduced strontium titanates. Our experimental results suggest that the oxygen vacancies could have played an important role in the reduction. This could be due to the nature of randomly distributed and clustered vacancies, which would be very effective to scatter phonons. Our results could provide a pathway for tailoring the thermal conductivity of complex oxides, which is very beneficial to various applications including thermoelectrics
Original languageEnglish
Pages (from-to)191911
Number of pages3
JournalApplied physics letters
Volume92
Issue number19
DOIs
Publication statusPublished - 2008

Keywords

  • IR-75215

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