A Novel Approach to Obtain GeSbTe-Based High Speed Crystallizing Materials for Phase Change Optical Recording

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Abstract:

A new approach is proposed to obtain fast crystallizing materials based on a conventional GeSbTe alloy for rewritable phase change optical data storage. By means of co-sputtering, Ge1Sb2Te4 alloy was mixed with Sn1Bi2Te4 alloy so as to form pseudo-binary alloys Ge1Sb2Te41-xSn1Bi2Te4x x is a mole fraction. From structural and optical analyses of the Co sputtered and annealed alloy films, the formation of stable crystalline single phases was observed along with a Vegards law behavior, suggesting a homogeneous mixing of the two alloys. By use of a 4 layered disk with Ge1Sb2Te40.85Sn1Bi2Te40.15 recording layer, a preliminary test of writing and erasing was carried out and the results were compared with the case of the disk with Ge1Sb2Te4 recording layer. The Ge1Sb2Te40.85Sn1Bi2Te40.15 recording layer was found to yield markedly higher erasibility, especially with increasing disk linear velocity.

Author(s):
Lee, Tae Y. ; Cheong, Byung-ki ; Lee, Taek S. ; Park, Sung J. ; Kim, Won M.
Author Organization(s):
SEOUL NATIONAL UNIV (REPUBLIC OF KOREA) SCHOOL OF MATERIALS SCIENCE AND ENGINEERING
Descriptive Note:
Conference proceedings
Supplementary Note:
Pub. in Materials Research Society symposium proceedings; v. 674 pV1.7.1-V1.7.6, 2001. Prepared in cooperation with the Materials Design Lab., Korea Inst. of Science and Technology, Seoul, Korea. This article is from ADA402512 Applications of Ferromagnetic and Optical Materials, Storage and Magnetoelectronics: Symposia Held in San Francisco, California, U.S.A. on April 16-20, 2001
Pagination:
0006

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
DAAD19-00-1-0421, N00014-01-1-0734
Monitor Series:
ARO, ONR
 Subject Terms
Modernization Areas:
Directed Energy
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*HIGH VELOCITY, *CRYSTALLIZATION, *OPTICAL STORAGE, *DISK RECORDING SYSTEMS, *GERMANIUM ALLOYS, TEST AND EVALUATION, ANNEALING, SYMPOSIA, PHASE TRANSFORMATIONS, STRUCTURAL ANALYSIS, THIN FILMS, READ WRITE MEMORIES, OPTICAL ANALYSIS, KOREA, SPUTTERING, BINARY ALLOYS, COBALT, HOMOGENEITY, TIN ALLOYS
Field(s)/Group(s):
Properties of Metals and Alloys, Crystallography, Optics, Solid State Physics
Keyword(s):
COMPONENT REPORT, FOREIGN REPORTS, GERMANIUM ANTIMONY TELLURIUM ALLOY, REWRITABLE MEMORIES, *PHASE CHANGE RECORDING, VEGARD LAW
Report Date:
2001 Apr 01
Creation Date:
2002 Jun 26