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Short Range Order Strucrures in Y-Pr-Ba-Cu-O System Studied by X-Ray Absorption Fine Structure (XAFS) Techniques

Published online by Cambridge University Press:  26 February 2011

Y.H. Kao ,
A. Krol ,
Z.H. Ming ,
C.S. Lin ,
Y.L. Soo ,
C.X. Gu ,
I.S. Yang  and
C.C. Tsuei
Y.H. Kao
Affiliation:
Physics Department, State University of New York at Buffalo, Buffalo, NY 14260
A. Krol
Affiliation:
Physics Department, State University of New York at Buffalo, Buffalo, NY 14260
Z.H. Ming
Affiliation:
Physics Department, State University of New York at Buffalo, Buffalo, NY 14260
C.S. Lin
Affiliation:
Physics Department, State University of New York at Buffalo, Buffalo, NY 14260
Y.L. Soo
Affiliation:
Physics Department, State University of New York at Buffalo, Buffalo, NY 14260
C.X. Gu
Affiliation:
Physics Department, State University of New York at Buffalo, Buffalo, NY 14260
I.S. Yang
Affiliation:
IBM T.J. Watson Research Center, Yorktown Heights, NY 10598
C.C. Tsuei
Affiliation:
IBM T.J. Watson Research Center, Yorktown Heights, NY 10598
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Abstract

Local structure around the constituent atoms in the compound system Y1-xPrxBa2CU3O7-y has been investigated by means of x-ray absorption fine structure (XAFS) techniques. By comparing the local structure in the compound x=1 with its counterpart x=0, the XAFS results provide a direct evidence that Pr has replaced Y in the material. The nearest-neighbor structure in the CuO2 planes seems to remain intact as × varies from 0 to 1, indicating that substitution of Pr for Y does not disturb the local distribution of holes in the CuO2 planes. We suggest that local disorder and distortions in the second-neighbor bonding configuration could be responsible for suppression of superconductivity with increasing Pr content in the system.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 209: Symposium K – Defects in Materials , 1990 , 759
Copyright
Copyright © Materials Research Society 1991

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References

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