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Critical current measurements in YBa2Cu3O7−x thin film grown on LaAlO3 substrate (1990)

Qiu, X. G. ; Cui, C. G. ; Zhang, Y. Z. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 68 (1990), S. 884-886

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: The critical current density Jc(B,T) of epitaxial YBa2Cu3O7−x (YBCO) thin films on LaAlO3 was measured under different applied magnetic fields (0–7 T) with the temperature ranging from 65 to 79 K. At 65 K, the zero-field critical current density of the best film was 5.8×106 A/cm2; even at magnetic fields up to 7 T, Jc could reach as high as 1×106 A/cm2. Strong anisotropy was observed at 79 K. The anisotropy behavior diminished with the decrease of temperature. Experimental results showed that Jc was proportional to (Tc−T)3/2 ; this was in accordance with the theoretical explanation by the Josephson junction model for granular superconductors.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.346784

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