Initial structure memory of pressure-induced changes in the phase-change memory alloy Ge2Sb2Te5

M. Krbal, A. V. Kolobov, J. Haines, P. Fons, C. Levelut, R. Le Parc, M. Hanfland, J. Tominaga, A. Pradel, M. Ribes

研究成果: Article査読

54 被引用数 (Scopus)

抄録

We demonstrate that while the metastable face-centered cubic (fcc) phase of Ge2Sb2Te5 becomes amorphous under hydrostatic compression at about 15 GPa, the stable trigonal phase remains crystalline. Upon higher compression, a body-centered cubic phase is obtained in both cases around 30 GPa. Upon decompression, the amorphous phase is retained for the starting fcc phase while the initial structure is recovered for the starting trigonal phase. We argue that the presence of vacancies and associated subsequent large atomic displacements lead to nanoscale phase separation and loss of initial structure memory in the fcc staring phase of Ge2Sb2Te5.

本文言語English
論文番号115502
ジャーナルPhysical review letters
103
11
DOI
出版ステータスPublished - 2009 9月 9
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学一般

フィンガープリント

「Initial structure memory of pressure-induced changes in the phase-change memory alloy Ge2Sb2Te5」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル