Abstract
The nominal composition of YBa2−x M x Cu3O y (M = K, Na) cuprates with x ≤ 0.30 were synthesized by the standard solid-state reaction technique. X-ray diffraction (XRD) and the resistivity measurements were used to characterize the structure and the superconductivity of the doped cuprates. There was no impurity phase detected within the whole doping range. The structure of the main phase (“123”) has the orthorhombic with P mmm symmetry. With increasing the content of dopants, the lattice constants and some other structural parameters are almost unchanged for M = K, whereas they changed for M = Na. The refined contents of dopants are consistent with that of the nominal ones. The zero resistance temperature T c0 decreases sharply with the increase of the content of potassium in potassium-doped samples as x ≤ 0.20. For sodium-doped YBa2−z Na x Cu3O y cuprates, T c0 varies very little. The difference in superconductivity depression may result from the shift oxygen, which transfers conducting carriers from Cu-O chains to Cu-O2 sheets or the structural stress effect.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
R. J. Cava, A. W. Hewat, E. A. Hewat, B. Batlogg, M. Marezio, K. M. Pabe, J. J. Drajewski, W. F. Peck Jr., and L. W. Rapp Jr., Physica C 165, 419 (1990).
J. D. Jorgensen, B. W. Veal, A. P. Paulikis, L. J. Lowicki, and G. W. Grabtree, Phys.Rev. 41, 1863 (1990).
X. S. Wu, S. S. Jiang, C. C. Lam, D.W. Wang, X. R. Huang, Z. H. Wu, Y. Xuan, and X. Jin, Phys.Stat.Sol.(a) 157, 439 (1996).
Y. Sun, G. Stasser, E. Gornik, W. Seidenbusch, and W. Rauch, Physica C 206, 291 (1993).
E. Sard, A. Maignan, V. Caignaert, and B. Kaveu, Physica C 200, 43 (1992).
R. G. Buckley, D. M. Pooke, J. L. Tallon, M. R. Presland, N. E. Flower, M. P. Staines, H. L. Johnson, M. Meylan, G. V. M. Williams, and M. Bowden, Physica. C 174, 383 (1991).
G. Xiao and N. S. Rebello, Physica C 211, 433 (1993).
D. P. Norton, D. H. Lowades, B. C. Sales, J. D. Budai, B. C. Chakoumakos, and H. R. Kerchner, Phys.Rev.Lett. 66, 1537 (1991).
J. P. Locquet, J. Pernet, J. Fompeyrine, E. Machler, J. W. Seo, and G. Van Tendeloo, Nature 394, 453 (1998).
X. S. Wu and J. Gao, Physica C 313, 79 (1999).
X. S. Wu and J. Gao, Physica C 313, 49 (1999).
A. Manthiram and J. B. Goodenough, Physica C 159, 760 (1989).
A. Manthiram, S. J. Lee, and J. B. Goodenough, J.Solid State Chem. 73, 278 (1988).
X. S. Wu, S. S. Jiang, J. Lin, J. S. Liu, and X. Jin, Physica C 309, 25 (1998).
X. S. Wu and J. Gao, Physica C 315, 215 (1999).
W. H. Tang and J. Gao, Physica C 298, 66 (1998).
J. G. Lin, C. Y. Huang, Y. Y. Xue, C. W. Chu, X. W. Cao, and J. C. Ho, Phys.Rev. B 51, 12900 (1995).
R. A. Young, J.Appl.Cryst. 28, 366 (1995).
J. B. Goodnough, J. M. Lango, and L. B. Tabellem, New Series Vol. III/4a, Spring Berlin, (1970).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Wu, X.S., Wang, F.Z., Nie, S. et al. Comparison of Superconductivity and Structure for YBa2Cu3Oy with Potassium and Sodium Doping. Journal of Superconductivity 13, 653–658 (2000). https://doi.org/10.1023/A:1007897506412
Issue Date:
DOI: https://doi.org/10.1023/A:1007897506412