Paper Title:
Simultaneous Substitution of Y and Ba by Ca in YBCO
  Abstract

A series of samples of Y1-xCaxBa2Cu3Oy (YCBCO) were synthesized with 0.05≤x≤0.3 and characterized by DC magnetization, X-ray diffraction (XRD), and Rietveld refinement. It was found that Ca replaces Y and Ba in YBa2Cu3Oy (YBCO) simultaneously, and the amount of Ca in the Y and Ba positions is estimated by the refinement,respectively. The experimental results showed that the structural changes had a close correlation with Tc. With careful analysis of the change of the Tc below and above x=0.2 and the changes of the bond lengths, such as Cu(2)-O(2) and Cu(2)-O(3), it is suggested that the Ca substitution for Y suppresses the Tc more strongly than that for Ba.

  Info
Periodical
Materials Science Forum (Volumes 546-549)
Edited by
Yafang Han et al.
Pages
2123-2126
DOI
10.4028/www.scientific.net/MSF.546-549.2123
Citation
L. Zhang, J. Yu, H. Zhang, "Simultaneous Substitution of Y and Ba by Ca in YBCO", Materials Science Forum, Vols. 546-549, pp. 2123-2126, 2007
Online since
May 2007
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