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Investigation of Cation Disorder In ‘C’ Axis Ybco 123 Thin Films Using Raman Microscopy

Published online by Cambridge University Press:  15 February 2011

L. F. Cohen ,
Y. B. Li ,
G. Gibson  and
J. MacManus-Driscoll
L. F. Cohen
Affiliation:
Blackett Laboratory, Imperial College, London SW7, UK, l.cohen@ic.ac.uk.
Y. B. Li
Affiliation:
Blackett Laboratory, Imperial College, London SW7, UK, l.cohen@ic.ac.uk.
G. Gibson
Affiliation:
Department of Materials Science, Imperial College, London SW7, UK, j.driscoll@ic.ac.uk
J. MacManus-Driscoll
Affiliation:
Department of Materials Science, Imperial College, London SW7, UK, j.driscoll@ic.ac.uk
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Abstract

Two 123 thin films grown by e-beam evaporation have been studied using Raman microscopy. The films were grown under different conditions of temperature and oxygen partial pressure and show different levels of cation disorder as determined from the ‘c’ axis lattice parameter in combination with x-ray data. The oxygen stoichiometry in each film was changed by controlled anneals using a coulometric titration apparatus. As a result we report on the sensitivity of the 500cm−1 and 585cm−1 Raman peak to the oxygen stoichiometry and how the intensity and position of these peaks can be used to detect or confirm the presence of a small amount of cation disorder.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 401: Symposium G – Epitaxial Oxide Thin Films II , 1995 , 351
Copyright
Copyright © Materials Research Society 1996

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