Comparison of transport and magnetization critical currents in c‐axis‐oriented Y1Ba2Cu3O7−δ thin films
作者： C. T. Blue , C. A. Blue , P. Boolchand
DOI: 10.1063/1.351827
关键词: High-temperature superconductivity 、 Materials science 、 Josephson effect 、 Sputtering 、 Flux pinning 、 Magnetization 、 Magnetic hysteresis 、 Substrate (electronics) 、 Thin film 、 Condensed matter physics
摘要: Transport, structural, and magnetic properties of c‐axis‐oriented Y1Ba2Cu3O7−δ thin films grown by off‐axis in situ rf sputtering on MgO substrates have been investigated. By varying the substrate surface preparation prior to deposition, could be with systematic improvements their dc transport structural properties. At same time, these display a decrease irreversible magnetization ΔM(H) at all temperatures. Transport inductive critical current densities cases displayed temperature dependence that ascribed flux creep and/or intragrain Josephson junctions. The for showed sample size consistent Bean critical‐state model. An anticorrelation between was observed, which can understood terms changes density pinning sites as function preparation.
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sci-hub.se 参考文章(45)
S. Jin, T. H. Tiefel, R. C. Sherwood, R. B. van Dover, M. E. Davis, G. W. Kammlott, R. A. Fastnacht, Melt-textured growth of polycrystalline YBa2Cu3O7- delta with high transport Jc at 77 K. Physical Review B. ,vol. 37, pp. 7850- 7853 ,(1988) , 10.1103/PHYSREVB.37.7850
J. H. Brunner, H. J. Leisi, C. F. Perdrisat, P. Scherrer, MONOENERGETIC POSITRONS IN THE DECAY OF Bi$sup 20$$sup 6$ Physical Review Letters. ,vol. 2, pp. 207- 209 ,(1959) , 10.1103/PHYSREVLETT.2.207
T. R. Dinger, T. K. Worthington, W. J. Gallagher, R. L. Sandstrom, Direct observation of electronic anisotropy in single-crystalY1Ba2Cu3O7−x Physical Review Letters. ,vol. 58, pp. 2687- 2690 ,(1987) , 10.1103/PHYSREVLETT.58.2687
W. Schindler, Reduction of flux creep in spite of ajcdecrease in YBa2Cu3O7−δafter neutron irradiation Journal of Applied Physics. ,vol. 70, pp. 1877- 1879 ,(1991) , 10.1063/1.349488
U. Welp, W. K. Kwok, G. W. Crabtree, K. G. Vandervoort, J. Z. Liu, Magnetization hysteresis and flux pinning in twinned and untwinned YBa2Cu3O7−δsingle crystals Applied Physics Letters. ,vol. 57, pp. 84- 86 ,(1990) , 10.1063/1.104237
S. Jin, R. C. Sherwood, E. M. Gyorgy, T. H. Tiefel, R. B. van Dover, S. Nakahara, L. F. Schneemeyer, R. A. Fastnacht, M. E. Davis, Large magnetic hysteresis in a melt‐textured Y‐Ba‐Cu‐O superconductor Applied Physics Letters. ,vol. 54, pp. 584- 586 ,(1989) , 10.1063/1.101464
H. Küpfer, I. Apfelstedt, R. Flükiger, C. Keller, R. Meier-Hirmer, B. Runtsch, A. Turowski, U. Wiech, T. Wolf, Intragrain junctions in YBa2Cu3O7−x ceramics and single crystals Cryogenics. ,vol. 29, pp. 268- 280 ,(1989) , 10.1016/0011-2275(89)90172-0
W. A. Fietz, W. W. Webb, Hysteresis in Superconducting Alloys-Temperature and Field Dependence of Dislocation Pinning in Niobium Alloys Physical Review. ,vol. 178, pp. 657- 667 ,(1969) , 10.1103/PHYSREV.178.657
X. Z. Zhou, M. Raudsepp, Q. A. Pankhurst, A. H. Morrish, Y. L. Luo, I. Maartense, Susceptibility, crystal-structure, and Mössbauer study of the high-temperature superconductor YBa2Cu3O7- delta doped with iron. Physical Review B. ,vol. 36, pp. 7230- 7233 ,(1987) , 10.1103/PHYSREVB.36.7230
P. Chaudhari, R. H. Koch, R. B. Laibowitz, T. R. McGuire, R. J. Gambino, Critical-current measurements in epitaxial films ofYBa2Cu3O7−xcompound Physical Review Letters. ,vol. 58, pp. 2684- 2686 ,(1987) , 10.1103/PHYSREVLETT.58.2684