A reversible change of reflected light intensity between molten and solidified Ge-Sb-Te alloy

Masashi Kuwahara, Rie Endo, Toshio Fukaya, Takayuki Shima, Yasuhiko Iwanabe, Paul Fons, Junji Tominaga, Masahiro Susa

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The reflected light intensity (IR) from the solid and liquid phases of Ge-Sb-Te alloy has been statically measured, IR rapidly decreased after crossing the melting point during the heating process, and increased to its initial intensity level after solidifying during the cooling process. A special sample preparation technique using a quartz cell enabled reliable measurements to be carried out. The structure and composition of the Ge-Sb-Te alloy was investigated using Raman scattering and X-ray fluorescence after the melting process. Germanium was found to preferentially diffuse from the bulk to the surface leading to a germanium oxide surface phase.

Original languageEnglish
Pages (from-to)L868-L870
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume46
Issue number36-40
DOIs
Publication statusPublished - 2007 Oct 12
Externally publishedYes

Keywords

  • Ge-Sb-Te alloy
  • Melting point
  • Optical disk
  • Reflected light intensity
  • Static measurement

ASJC Scopus subject areas

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

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