Vortex pinning/dynamics in YBCO films with J{sub c} (77 K) {gt} 3{center{underscore}dot}10{sup 6} A/cm{sup 2} studied by direct transport measurements

• Published in: Journal of low temperature physics Vol. 117; no. 5-6
• Main Authors: Pan, V.M., Kasatkin, A.L., Flis, V.S., Komashko, V.A., Svetchnikov, V.L., Pronin, A.V., Snead, C.L., Suenaga, M., Zandbergen, H.W.
• Format: Journal Article
• Language: English
• Published: United States 01-12-1999
• Subjects: BARIUM OXIDES; COPPER OXIDES; CRITICAL CURRENT; CURRENT DENSITY; EDGE DISLOCATIONS; HIGH-TC SUPERCONDUCTORS; MAGNETIC FLUX; MATERIALS SCIENCE; MATHEMATICAL MODELS; YTTRIUM OXIDES
• ISSN: 0022-2291; 1573-7357
• DOI: 10.1023/A:1022586926605

Critical current density, J{sub c}, is studied for highly biaxially-oriented YBCO thin films with J{sub c}(77 K) > 3 MA/cm{sup 2} in a range of magnetic fields, temperatures, angles between magnetic field vector and film c-axis. J{sub c}(H,{theta}) is shown to be dominated by vortex interaction with high density (>10{sup 11} lines/cm{sup 2}) of linear pins--edge dislocations. A model is developed to describe different vortex arrays behavior in the presence of two-dimensional square network of linear pins.