BaZrO3 和 KTaO3 单晶体的导热性

IF 2.3 4区物理与天体物理 Q3 PHYSICS, APPLIED

Applied Physics Express Pub Date : 2024-07-10 DOI:10.35848/1882-0786/ad5c26

Makoto Tachibana, Cédric Bourgès and Takao Mori

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引用次数: 0

摘要

BaZrO3 和 KTaO3 是包晶氧化物中两个罕见的例子，它们能在最低温度下保持理想的立方结构。本文报告了这些化合物单晶体在 300 至 773 K 之间的热导率（κ）。对于 BaZrO3，300 K 时的 κ 为 7.5 Wm-1K-1，比之前报告的多晶值大 40%。对于 KTaO3，我们在 300 K 时得出的 13.1 Wm-1K-1 值澄清了之前报告的一些数据的误差来源。这些结果凸显了高质量实验数据在衡量先进的第一原理κ计算精度方面的重要性。

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Thermal conductivity of BaZrO3 and KTaO3 single crystals

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.

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来源期刊

Applied Physics Express 物理-物理：应用

CiteScore

4.80

自引率

8.70%

发文量

310

审稿时长

1.2 months

期刊介绍： Applied Physics Express (APEX) is a letters journal devoted solely to rapid dissemination of up-to-date and concise reports on new findings in applied physics. The motto of APEX is high scientific quality and prompt publication. APEX is a sister journal of the Japanese Journal of Applied Physics (JJAP) and is published by IOP Publishing Ltd on behalf of the Japan Society of Applied Physics (JSAP).