Understanding the phase-change mechanism of rewritable optical media

Alexander V. Kolobov; Paul Fons; Anatoly I. Frenkel; Alexei L. Ankudinov; Junji Tominaga; Tomoya Uruga

doi:10.1038/nmat1215

Understanding the phase-change mechanism of rewritable optical media

Alexander V. Kolobov, Paul Fons, Anatoly I. Frenkel, Alexei L. Ankudinov, Junji Tominaga, Tomoya Uruga

Research output: Contribution to journal › Article › peer-review

1170 Citations (Scopus)

Abstract

The phase-change mechanism of the rewritable optical media was studied. An amorphous as-deposited GST layer was crystallized by exposure to a laser beam of intensity sufficient to heat the material to a temperature slightly above the glass-transition temperature. It was observed that crystalline GeTe possessed a certain amount of vacancies on Ge sites. It was found that GST can be viewed as being built from well-defined rigid blocks of the composition Ge ₂Sb₂Te₅. It was suggested that the mechanism of the structural phase transition provides potentially critical insight in the search for better performing materials.

Original language	English
Pages (from-to)	703-708
Number of pages	6
Journal	Nature Materials
Volume	3
Issue number	10
DOIs	https://doi.org/10.1038/nmat1215
Publication status	Published - 2004 Oct
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1038/nmat1215

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title = "Understanding the phase-change mechanism of rewritable optical media",

abstract = "The phase-change mechanism of the rewritable optical media was studied. An amorphous as-deposited GST layer was crystallized by exposure to a laser beam of intensity sufficient to heat the material to a temperature slightly above the glass-transition temperature. It was observed that crystalline GeTe possessed a certain amount of vacancies on Ge sites. It was found that GST can be viewed as being built from well-defined rigid blocks of the composition Ge 2Sb2Te5. It was suggested that the mechanism of the structural phase transition provides potentially critical insight in the search for better performing materials.",

author = "Kolobov, {Alexander V.} and Paul Fons and Frenkel, {Anatoly I.} and Ankudinov, {Alexei L.} and Junji Tominaga and Tomoya Uruga",

note = "Funding Information: The XAFS measurements were performed at beamlines 12C at the Photon Factory, Japan, and BL01B1 at SPring-8, Japan as parts of proposals 2001G332 and 2001B0099-NX, respectively.A.V.K. would like to thank A. S. Mishchenko for a useful discussion.A. I. F. acknowledges support by the US Department of Energy Grant No. DE-FG02-03ER15477. Correspondence and requests for materials should be addressed to A.V.K. Supplementary Information accompanies the paper on www.nature.com/naturematerials",

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AU - Fons, Paul

AU - Frenkel, Anatoly I.

AU - Ankudinov, Alexei L.

AU - Tominaga, Junji

AU - Uruga, Tomoya

N1 - Funding Information: The XAFS measurements were performed at beamlines 12C at the Photon Factory, Japan, and BL01B1 at SPring-8, Japan as parts of proposals 2001G332 and 2001B0099-NX, respectively.A.V.K. would like to thank A. S. Mishchenko for a useful discussion.A. I. F. acknowledges support by the US Department of Energy Grant No. DE-FG02-03ER15477. Correspondence and requests for materials should be addressed to A.V.K. Supplementary Information accompanies the paper on www.nature.com/naturematerials

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Understanding the phase-change mechanism of rewritable optical media

Abstract

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