Superconductivity and oxygen ordering in (Ca,Ba,La)Cu3O7- delta.
作者： T. Bjrnholm , I. K. Schuller , E. A. Early , M. B. Maple , B. Wuyts
DOI: 10.1103/PHYSREVB.41.11154
关键词: Electrical resistivity and conductivity 、 Transition temperature 、 Crystallography 、 Magnetization 、 Energy (signal processing) 、 Magnetic susceptibility 、 Binding energy 、 Superconductivity 、 Materials science 、 Condensed matter physics 、 Phase diagram
摘要: Magnetization measurements on polycrystalline samples with nominal composition Y{sub 1{minus}{ital x}}Ca{sub {ital x}}Ba{sub 2{minus}{ital x}}La{sub x}}Cu{sub 3}O{sub 7{minus}{delta}} ({ital x}=0.0, 0.05, 0.10, 0.50, and 1.0) show that only x}=1.0 or 0.0 contain a single superconducting} phase. Gas evolution experiments (Ca,Ba,La)Cu{sub x}=1.0, {delta}{similar to}0.07) reveal the presence of an oxygen phase is indistinguishable from chain structure YBa{sub 2}Cu{sub to}0.05); however, total amount evolved very different between two phases. These studies suggest phases coexist in 7{minus}{delta}}: which La{sup 3+} ions occupy Y{sup sites, second nonsuperconducting} where Ca{sup 2+} sites.
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sci-hub.se 参考文章(15)
D. W. Murphy, S. Sunshine, R. B. van Dover, R. J. Cava, B. Batlogg, S. M. Zahurak, L. F. Schneemeyer, New superconducting cuprate perovskites. Physical Review Letters. ,vol. 58, pp. 1888- 1890 ,(1987) , 10.1103/PHYSREVLETT.58.1888
A. H. Carim, A. F. de Jong, D. M. de Leeuw, Ordering phenomena in the tetragonal superconductor CaBaLaCu3O7–δ Physical Review B. ,vol. 38, pp. 7009- 7012 ,(1988) , 10.1103/PHYSREVB.38.7009
D.M. De Leeuw, C.A.H.A. Mutsaers, H.A.M. Van Hal, H. Verweij, A.H. Carim, H.C.A. Smoorenburg, Properties of the tetragonal superconductor CaBaLaCu3Ox Physica C-superconductivity and Its Applications. ,vol. 156, pp. 126- 132 ,(1988) , 10.1016/0921-4534(88)90117-7
W.T. Fu, H.W. Zandbergen, C.J. van der Beek, L.J. de Jongh, High-temperature superconductivity in LaBaCaCu3O6.85 Physica C-superconductivity and Its Applications. ,vol. 156, pp. 133- 136 ,(1988) , 10.1016/0921-4534(88)90118-9
R. J. Cava, B. Batlogg, C. H. Chen, E. A. Rietman, S. M. Zahurak, D. Werder, Single-phase 60-K bulk superconductor in annealed Ba2YCu Physical Review B. ,vol. 36, pp. 5719- 5722 ,(1987) , 10.1103/PHYSREVB.36.5719
A.I. Nazzal, V.Y. Lee, E.M. Engler, R.D. Jacowitz, Y. Tokura, J.B. Torrance, New procedure for determination of [Cu-O]+p charge and oxygen content in high Tc copper oxides Physica C-superconductivity and Its Applications. ,vol. 153, pp. 1367- 1368 ,(1988) , 10.1016/0921-4534(88)90324-3
J.J. Neumeier, Y. Dalichaouch, R.R. Hake, B.W. Lee, M.B. Maple, M.S. Torikachvili, K.N. Yang, R.P. Guertin, M.V. Kuric, Upper critical magnetic field measurements in RBa2Cu3O7−δ (R=rareearth) compounds Physica C-superconductivity and Its Applications. ,vol. 152, pp. 293- 301 ,(1988) , 10.1016/0921-4534(88)90087-1
F. Habbal, G. E. Watson, P. R. Elliston, Simple cryostat for measuring rf susceptibility from 4.2 to 300 K Review of Scientific Instruments. ,vol. 46, pp. 192- 195 ,(1975) , 10.1063/1.1134163
J.-P Locquet, J Vanacken, B Wuyts, Y Bruynseraede, K Zhang, I. K Schuller, Oxygen Bonding in High-Temperature Superconductors EPL. ,vol. 7, pp. 469- 472 ,(1988) , 10.1209/0295-5075/7/5/016
K. E. Gray, I. Schuller, Deviations of the equilibrium order parameter from mean field theory in superconducting aluminum films Journal of Low Temperature Physics. ,vol. 28, pp. 75- 81 ,(1977) , 10.1007/BF00658958