ac susceptibility and critical-current densities in sintered YBa2Cu3O7−δ superconductors
Chen, Du-Xing (Institució Catalana de Recerca i Estudis Avançats)
Sánchez Moreno, Álvaro (Universitat Autònoma de Barcelona. Departament de Física)
Pardo Vivé, Enric (Universitat Autònoma de Barcelona. Departament de Física)
Bartolomé Porcar, María Elena (Universitat Autònoma de Barcelona. Departament de Física)
American Physical Society

Data:	2006
Resum:	The field-amplitude and frequency dependent complex ac susceptibility of a well sinteredYBa2Cu3O7−δ disk has been measured at 77K, which shows that its intra- and intergranular critical-current densities are determined by the collective flux creep inside the grains and the maximum Josephsoncurrents across the grain boundaries, respectively. While the former is widely recognized, the latter contrasts to a popular belief of a mechanism of Josephson-vortex pinning and creep.
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	High temperature superconductivity ; Superconductivity models ; Sintering ; Creep ; Josephson effect ; Josephson junctions ; Critical currents ; Flux creep ; Rotating flows ; Superconductors
Publicat a:	Applied physics letters, Vol. 89, Issue 7 (August 2006) , p. 072501/1-072501/3, ISSN 1077-3118

DOI: 10.1063/1.2336596

4 p, 260.7 KB

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