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Critical current in YBa2Cu3O7 ceramics (1989)

Zwartz, E. G. ; Judd, B. A. ; Batalla, E. ; [et al.]

Springer

Journal of low temperature physics 74 (1989), S. 277-291

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ISSN: 1573-7357

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract Measurements of critical currents using a four-point direct current (dc) method and an alternating magnetic field method have been performed on several superconducting YBa2Cu3O7 ceramics at 77 K. In the presence of a constant magnetic field, the critical currents obtained with the alternating field method are several orders of magnitude larger than the critical currents measured by the dc method. Also, we observed a minimum in the dc critical current as a function of applied transverse magnetic field. Several authors have suggested that these ceramics behave as individual superconducting grains coupled by Josephson junctions. In this paper, we explain the two observations above using that model.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00683376

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