Pressure-Induced Site-Selective Disordering of Ge2Sb2Te5: A New Insight into Phase-Change Optical Recording

A. V. Kolobov, J. Haines, A. Pradel, M. Ribes, P. Fons, J. Tominaga, Y. Katayama, T. Hammouda, and T. Uruga
Phys. Rev. Lett. 97, 035701 – Published 20 July 2006

Abstract

We demonstrate that Ge2Sb2Te5, the material of choice in phase-change optical recording (such as DVD-RAM), can be rendered amorphous by the application of hydrostatic pressure. It is argued that this structural change is due to a very strong second-nearest-neighbor Te-Te interaction that determines the long-range order in the metastable cubic phase of Ge2Sb2Te5 and also to the presence of vacancies. This newly discovered phenomenon suggests that pressure is an important factor for the formation of the amorphous phase which opens new insight into the mechanism of phase-change optical recording.

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  • Received 9 February 2006

DOI:https://doi.org/10.1103/PhysRevLett.97.035701

©2006 American Physical Society

Authors & Affiliations

A. V. Kolobov1,2, J. Haines2, A. Pradel2, M. Ribes2, P. Fons1, J. Tominaga1, Y. Katayama3, T. Hammouda4, and T. Uruga5

  • 1Center for Applied Near-Field Optics Research (CanFor), National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba 305-8562, Japan
  • 2Laboratoire de Physicochimie de la Matière Condensée, UMR CNRS 5617, Université Montpellier II, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
  • 3Synchrotron Radiation Research Center, Japan Atomic Energy Agency, Kouto, 1-1-1, Sayo, Hyogo 679-5148, Japan
  • 4Laboratoire Magmas et Volcans, Université Blaise Pascal–CNRS–OPGC, 5 rue Kessler, 63038 Clermont-Ferrand Cedex, France
  • 5JASRI, SPring8, Mikazuki, Hyogo 679-5198, Japan

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Issue

Vol. 97, Iss. 3 — 21 July 2006

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