Simultaneous Substitution of Y and Ba by Ca in YBCO


Article Preview

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.



Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.




L. Zhang et al., "Simultaneous Substitution of Y and Ba by Ca in YBCO", Materials Science Forum, Vols. 546-549, pp. 2123-2126, 2007

Online since:

May 2007




[1] J. W. Quilty and H. J. Trodahl, Phys. Rev. B Vol. 61 (2000), p.4238.

[2] V. P. S. Awana, A. V. Narlikar, Phys. Rev. B Vol. 49(1994), p.6353.

[3] C. H. Hsieh, C. N. Chang, S. B. Lee, H. -C. I. Kao, and C. H. Chin. Physca C Vol. 384 (2003), p.314.

[4] Dong Han Ha, Sunye Byon and Kyu Won Lee, Physica C Vol. 340 (2000) , p.243.

DOI: 10.1016/s0921-4534(00)01502-1

[5] R. G. Buckley, D. M. Pooke, and J. L. Tallon, et. al., Physica C Vol. 174(1991), p.383.

[6] G. Bottger, I. Magelschots, and E. Kaldis, et. al., J. Phys.: Condens. Matter Vol. 8 (1996), p.8889.

[7] H. M. Rietveld, J. Appl. Crystallogr. Vol. 2(1969) , p.65.

[8] N. L. Wang, M. C. Tan, J. S. Wang, S. Y. Zhang, H. B. Jiang, J. Sha, Q. R. Zhang, Supercond. Sci. Tech. Vol. 4(1991), ps307.

[9] A. Tokiwa, Y. Syono, and M. Kikuchi, et. al., Jpn.J. Appl. Phys. Vol. 27(1988), pL1009.

[10] J. M. S. Skakle, A .R. West, Physica C Vol. 321(1999), p.12.

[11] X. S. Wu, S. S. Jiang, J. Lin, J. S. Liu, W. M. Chen, and X. Jin, Physica C, Vol. 309(1998), p.25 a b c.

Fetching data from Crossref.
This may take some time to load.