Thermal conductivities and conduction mechanisms of Sb-Te Alloys at high temperatures

Rui Lan, Rie Endo, Masashi Kuwahara, Yoshinao Kobayashi, Masahiro Susa

研究成果: Article査読

13 被引用数 (Scopus)

抄録

Sb-Te alloys have drawn much attention due to its application in phase change memory as well as the unique properties as chalcogenide. In this work, the thermal conductivities of Sb-x molTe alloys (x = 14, 25, 44, 60, 70, and 90) have been measured by the hot strip method from room temperature up to temperature just below the respective melting points. For the intermetallic compound Sb2Te3 (x = 60), the thermal conductivity decreases up to approximately 600 K and then increases. For other Sb-x molTe alloys where x > 60, the thermal conductivities of the alloys decrease with increasing temperature. In contrast, for x < 60, the thermal conductivities of the alloys keep roughly constant up to approximately 600 K and then increase with increasing temperature. It is proposed that free electron dominates the heat transport below 600 K, and ambipolar diffusion also contributes to the increase in the thermal conductivity at higher temperatures. The prediction equation from temperature and chemical composition has been proposed for thermal conductivities of Sb-Te alloys.

本文言語English
論文番号023701
ジャーナルJournal of Applied Physics
110
2
DOI
出版ステータスPublished - 2011 7月 15
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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