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BaZrO3 and KTaO3 are two rare examples of perovskite oxides that retain the ideal cubic structure down to the lowest temperature. In this paper, we report thermal conductivity (κ) between 300 and 773 K on single crystals of these compounds. For BaZrO3, the κ of 7.5 Wm−1K−1 at 300 K is ∼40% larger than the previously reported polycrystalline values. For KTaO3, our value of 13.1 Wm−1K−1 at 300 K clarifies the sources of error in some of the previously reported data. These results underscore the importance of high-quality experimental data in benchmarking the accuracy of advanced first-principles κ calculations.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: thermal conductivity, single crystals, oxides

刊行年月日: 2024-07-01

出版者: IOP Publishing

掲載誌:

• Applied Physics Express (ISSN: 18820786) vol. 17 issue. 7 071003

研究助成金:

• JST-Mirai Program JPMJMI19A1

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.35848/1882-0786/ad5c26

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更新時刻: 2024-08-02 08:30:09 +0900

MDRでの公開時刻: 2024-08-02 08:30:09 +0900