Critical current versus normal-state resistivity in granular Y1Ba2Cu3O7-δ

• Published in: Applied physics letters Vol. 63; no. 12; pp. 1684 - 1686
• Main Authors: DIAZ, A, POMAR, A, DOMARCO, G, MAZA, J, VIDAL, F
• Format: Journal Article
• Language: English
• Published: Melville, NY American Institute of Physics 20-09-1993
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Critical currents; Cuprates superconductors (high tc and insulating parent compounds); Exact sciences and technology; High-Tc compounds; Physics; Properties of type I and type II superconductors; Superconductivity; Y-based cuprates; Inorganic compounds; Critical current; Granular materials; Barium oxides; High-Tc superconductors; Experimental study; Quaternary compounds; Copper oxides; Yttrium oxides
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/1.110684

Precision measurements of critical current densities at zero applied magnetic field Jc for six granular Y1Ba2Cu3O7−δ samples have been performed by using a low frequency induction method. Also, the intergrain resistivity ρct for each sample has been extracted from the normal-state resistivity. It is found experimentally that at any temperature distance from the transition, Jc is inversely proportional to ρct. A way to estimate Jc from the resistivity of the granular samples in the normal state is thus open.