Flux Creep Investigation in Bi2Sr2CaCu2O8+d High-Temperature Superconductor

• Main Authors: G. R. Blanca, J. Ronulo, G. Dumlao, R. Sarmago
• Format: Article
• Language: English
• Published: University of the Philippines 2004-12-01
• Series: Science Diliman
• Subjects: flux creep; Kim-Anderson approach
• Online Access: http://journals.upd.edu.ph/index.php/sciencediliman/article/view/90

The flux creep process in a c-axis Bi2Sr2CaCu2O8+d thin film was investigated at different temperatures and applied fields using the Kim-Anderson (KA) approach. The peaked behavior shown in the magnetoresistance profile was attributed to the competing mechanisms of flux motion and sample-intrinsic transition near Tc.Within the temperature range where the competition occurs, U increases with temperature and consequently a decrease in the superconducting volume corresponds to a decrease in the flux creep. Moreover, the flux creep potential barrier varies with applied current I at all temperatures consistent with the KA model.