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In this paper, the influence of Sn doping (0%, 8% and 14%) on the crystallization of Ge2Sb2Te5 was studied with the aid of an ultraviolet laser. The XRD analyses revealed that the addition of Sn maintained the NaCl-type structure of Ge2Sb2Te5 after crystallization but expanded the lattice parameter due to the smaller atomic radii of Ge replaced by Sn. Raman peaks (123, 150 and 110 cm(-1)) moved towards lower wavenumbers (118, 137 and 104 cm(-1)), which can be explained by the remarkable decrease of the binding energy from Ge-Te to Sn-Te. A remarkable increase in optical contrast from 15% to 40% was observed in the Sn-doped Ge2Sb2Te5 film after crystallization with both the isothermal annealing and laser radiance. While the optical contrast changed little for a fixed volume fraction of Sn-doped sample with the variation of laser fluence which is attributed to the crystallization mechanism induced by laser under different fluences is the same. (C) 2014 Elsevier B.V. All rights reserved.
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APPLIED SURFACE SCIENCE
ISSN: 0169-4332
Year: 2014
Volume: 316
Page: 202-206
6 . 7 0 0
JCR@2022
ESI Discipline: MATERIALS SCIENCE;
ESI HC Threshold:341
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
WoS CC Cited Count: 21
SCOPUS Cited Count: 22
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 4
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