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Defect Identification in (La,Sr)CoO3−δ Using Positron Annhiiilation Spectroscopy

Published online by Cambridge University Press:  10 February 2011

T. Friessnegg ,
B. Nielsen ,
V. J. Ghosh ,
A.R. Moodenbaugh ,
S. Madhukar ,
S. Aggarwal ,
D.J. Keeble ,
E.H. Poindexter ,
P. Mascher  and
R. Ramesh
T. Friessnegg
Affiliation:
Department of Materials Science and Nuclear Engineering, University of Maryland, College Park, Maryland 20742
B. Nielsen
Affiliation:
Materials Science Division, Brookhaven National Laboratory, Upton, New York 11973
V. J. Ghosh
Affiliation:
Materials Science Division, Brookhaven National Laboratory, Upton, New York 11973
A.R. Moodenbaugh
Affiliation:
Materials Science Division, Brookhaven National Laboratory, Upton, New York 11973
S. Madhukar
Affiliation:
Department of Materials Science and Nuclear Engineering, University of Maryland, College Park, Maryland 20742
S. Aggarwal
Affiliation:
Department of Materials Science and Nuclear Engineering, University of Maryland, College Park, Maryland 20742
D.J. Keeble
Affiliation:
Carnegie Laboratory of Physics, University of Dundee, Dundee DDI 4HN, United Kingdom
E.H. Poindexter
Affiliation:
Army Research Laboratory, Adelphi, Maryland 20783
P. Mascher
Affiliation:
Department of Engineering Physics, McMaster University, Hamilton, Ontario L8S 4L7, Canada
R. Ramesh
Affiliation:
Department of Materials Science and Nuclear Engineering, University of Maryland, College Park, Maryland 20742
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Abstract

Vacancy type defects in bulk La1−xSrxCoO3−δ samples were investigated by positron lifetime spectroscopy. The effects of Sr-doping as well as the effect of oxygen deficiency were determined. Comparing the resolved lifetimes with calculated values permits defect identification.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 541: Symposium O – Ferroelectric Thin Films VII , 1998 , 161
Copyright
Copyright © Materials Research Society 1999

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References

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