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Epr Spectroscopy on Zn-Substituted YBa2Cu3O7

Published online by Cambridge University Press:  28 February 2011

A. M. Ponte Goncalves ,
Chan-Soo Jee ,
D. Nichols ,
J. E. Crow ,
G. H. Myer ,
R. E. Salomon  and
P. Schlottmann
A. M. Ponte Goncalves
Affiliation:
Center for Materials Research, Temple University, Philadelphia, PA 19122
Chan-Soo Jee
Affiliation:
Center for Materials Research, Temple University, Philadelphia, PA 19122
D. Nichols
Affiliation:
Center for Materials Research, Temple University, Philadelphia, PA 19122
J. E. Crow
Affiliation:
Center for Materials Research, Temple University, Philadelphia, PA 19122
G. H. Myer
Affiliation:
Center for Materials Research, Temple University, Philadelphia, PA 19122
R. E. Salomon
Affiliation:
Center for Materials Research, Temple University, Philadelphia, PA 19122
P. Schlottmann
Affiliation:
Center for Materials Research, Temple University, Philadelphia, PA 19122
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Abstract

The temperature and concentration dependence of the electron paramagnetic resonance spectra of YBa2(Cu1−xZnx)3O7 has been measured for 0≤x≤0.16. Zn substituted on the Cu-site cause a rapid nearly linear depression of the superconducting transition temperature Tc with Tc going to zero in the vicinity of x=0.10. Only weak EPR spectra due to ≤1% of the Cu-ions are seen in the superconducting phase of YBa2Cu3O7. These spectra are most likely attributed to Cu-ions in the vicinity of grain boundaries and do not represent a bulk response. However, a strong asymmetric resonance is observed in the Zn-substituted samples with x>0.1. The EPR results obtained for YBa2(Cu1−xZnx)3O7 are discussed in terms of a possible localization of d-electrons.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 583
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

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