Temperature dependence of the thermal properties of optical memory materials

Masashi Kuwahara, Osamu Suzuki, Yuzo Yamakawa, Naoyuki Taketoshi, Takashi Yagi, Paul Fons, Toshio Fukaya, Junji Tominaga, Tetsuya Baba

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


We have measured the temperature dependence of the thermal conductivities of Ge2Sb2Te5 (GST) and ZnS-SiO2 using a nano second thermoreflectance measurement system from room temperature to 500-600°C. The specific heat capacities of these materials also have been determined from -130 to 500 °C for GST and from room temperature to 600°C for ZnS-SiO2. The Debye temperature was obtained from specific heat capacity measurement. Using the obtained temperature dependence of the thermal conductivities, a temperature simulation inside a simple structured optical disk with and without considering its temperature dependence was carried out, and the difference in maximum temperature was approximate 80 °C.

Original languageEnglish
Pages (from-to)3909-3911
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number6 B
Publication statusPublished - 2007 Jun 22
Externally publishedYes


  • Optical disk materials
  • Specific heat capacity
  • Temperature dependence
  • Thermal conductivity

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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