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Evidence for d-Electron Localization in YBa2(Cu1−xZnx)3O7 for 0<x<0.16

Published online by Cambridge University Press:  28 February 2011

C. Jee ,
D. Nichols ,
J. Ciasullo ,
J. E. Crow ,
T. Mihalisin ,
G. N. Myer ,
M. V. Kuric ,
S. H. Bloom  and
R. P. Guertin
C. Jee
Affiliation:
Center for Materials Research, Temple Univ., Philadelphia, PA 19122.
D. Nichols
Affiliation:
Center for Materials Research, Temple Univ., Philadelphia, PA 19122.
J. Ciasullo
Affiliation:
Center for Materials Research, Temple Univ., Philadelphia, PA 19122.
J. E. Crow
Affiliation:
Center for Materials Research, Temple Univ., Philadelphia, PA 19122.
T. Mihalisin
Affiliation:
Center for Materials Research, Temple Univ., Philadelphia, PA 19122.
G. N. Myer
Affiliation:
Center for Materials Research, Temple Univ., Philadelphia, PA 19122.
M. V. Kuric
Affiliation:
Center for Materials Research, Temple Univ., Philadelphia, PA 19122.
S. H. Bloom
Affiliation:
Center for Materials Research, Temple Univ., Philadelphia, PA 19122.
R. P. Guertin
Affiliation:
Physics Department, Tufts Univ., Medford, MA 02155.
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Abstract

Zn substitution for Cu in YBa2Cu3O7 rapidly reduces the superconducting transition temperature, Tc. Superconductivity is quenched between x=0.08 (T =30 K) and x=0.10. The normal state paramagnetism grows with Zn substu-tition, presumably due to increased localization on the Cu sublattice. Susceptibility studies of oxygen depleted (nonsuperconducting) Zn-substituted samples support this. Strong non-linear isothermal magnetization suggesting an internal magnetic field is found at T=4.2 K in samples with Zn concentration near to the critical value for suppression of superconductivity. The results are discussed in terms of increased localization of d-electrons on the Cu sites with increasing Zn concentration, which is consistent with recent EPR data.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 769
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

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