The structural effects of Na and Ca substitutions on the Y site in YBa2Cu3O7-x
作者： C Greaves , P R Slater
DOI: 10.1088/0953-2048/2/1/002
关键词:
摘要: On the basis of powder XRD data successful substitution Na for Y in YBa2Cu3O7-x could not be achieved. For Ca substitutions, however, single phase materials were obtained at doping levels up to 20% with Tc decreasing 80 K. The charge balance mechanism and resultant structural changes have been investigated using thermal analysis neutron diffraction. principal effects appear a reduction oxygen content basal plane unit cell, shifts Ba O ions compensate effective transfer positive from sites plane. Similar, but smaller, displacements Cu2 result decrease Cu2-Cu2 distance.
harvard.edu
sci-hub.se 参考文章(12)
Michikazu Kosuge, Bin Okai, Koh Takahashi, Masatsune Ohta, Preparation and Physical Properties of Y1-xCa1.1xBa2-0.1xCu3Oy Japanese Journal of Applied Physics. ,vol. 27, pp. L1022- L1024 ,(1988) , 10.1143/JJAP.27.L1022
Y. Dalichaouch, M.S. Torikachvili, E.A. Early, B.W. Lee, C.L. Seaman, K.N. Yang, H. Zhou, M.B. Maple, Superconducting and normal state properties of Y1−xMxBa2Cu3O7−δ (M=Pr, Na) Solid State Communications. ,vol. 65, pp. 1001- 1006 ,(1988) , 10.1016/0038-1098(88)90746-6
Ayako Tokiwa, Yasuhiko Syono, Masae Kikuchi, Reiko Suzuki, Tsuyoshi Kajitani, Norio Kobayashi, Takako Sasaki, Osamu Nakatsu, Yoshio Muto, Crystal Structure and Superconductivity Controlled by Cation Substitution and Oxygen Annealing in Y1-xCaxBa2Cu3Oyand YBa2-xLaxCu3Oy Japanese Journal of Applied Physics. ,vol. 27, pp. L1009- L1012 ,(1988) , 10.1143/JJAP.27.L1009
A. Fartash, H. Oesterreicher, Superconductivity in Y1−yNayBa2Cu3Ox Solid State Communications. ,vol. 66, pp. 39- 41 ,(1988) , 10.1016/0038-1098(88)90487-5
A. Manthiram, S.-J. Lee, J.B. Goodenough, Influence of Ca on the superconductivity of Y1−xCaxBa2Cu3O7−δ Journal of Solid State Chemistry. ,vol. 73, pp. 278- 282 ,(1988) , 10.1016/0022-4596(88)90080-1
Thomas J. Kistenmacher, Effect of the rare-earth ion R on structure and superconductivity in high-Tc RBa2Cu3Oy ceramics Solid State Communications. ,vol. 65, pp. 981- 985 ,(1988) , 10.1016/0038-1098(88)90742-9
W. I. F. David, W. T. A. Harrison, J. M. F. Gunn, O. Moze, A. K. Soper, P. Day, J. D. Jorgensen, D. G. Hinks, M. A. Beno, L. Soderholm, D. W. Capone II, I. K. Schuller, C. U. Segre, K. Zhang, J. D. Grace, Structure and crystal chemistry of the high-Tc superconductor YBa2Cu3O7−x Nature. ,vol. 327, pp. 310- 312 ,(1987) , 10.1038/327310A0
J. C. Matthewman, P. Thompson, P. J. Brown, The Cambridge Crystallography Subroutine Library Journal of Applied Crystallography. ,vol. 15, pp. 167- 173 ,(1982) , 10.1107/S0021889882011728
M.R. Chandrachood, I.S. Mulla, A.P.B. Sinha, Studies on superconductivity in Y1LaxBa2−xCu3O7± compositions Solid State Communications. ,vol. 68, pp. 1005- 1009 ,(1988) , 10.1016/0038-1098(88)90414-0
C. Greaves, P.R. Slater, E.M. Forgan, Li and Fe substitutions in YBa2Cu3O7 Physica B-condensed Matter. ,vol. 156, pp. 888- 890 ,(1989) , 10.1016/0921-4526(89)90822-3