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Effect of Ionic Bond in Recording Materials on Characteristics of Phase-Change Optical Disk

Published online by Cambridge University Press:  01 February 2011

Motoyasu Terao
Motoyasu Terao*
Affiliation:
Storage Technology Research Center, R&D Group, Hitachi Ltd. 1–280, Higashi-koigakubo Kokubunji, Tokyo, JapanPhone: +81–42–323–1111 ex.3255, Fax: +81–42–327–7765, E-mail: terao@rd.hitachi.co.jp
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Abstract

This paper discusses a crystallization model that takes difference of covalent bond and ionic bond into consideration. Ionic bond makes crystallization easier than covalent bond because ionic bond is more flexible than covalent bond. The diameter and spaces around large minus-ions should also be taken into consideration. Elements••having electronic negativity far from that of Te or Sb has a tendency to form ionic bonds. For example, Tb and In are considered to make chemical bonds having more ionic characteristics than Ge. In the case of already reported Sn or Bi addition, large ion diameter seems to increase crystallization speed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 803: Symposia GG/HH – Advanced Characterization Techniques for Data Storage Materials – Phase Change and Nonmagnetic Materials for Data Storage , 2003 , HH4.1
Copyright
Copyright © Materials Research Society 2004

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References

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