Influences of surface barrier on AC loss in Ag–Bi2223 tapes by simulation

• Published in: Physica. C, Superconductivity Vol. 495; pp. 1 - 4
• Main Authors: Liu, G.H., Zhang, L., Li, Y.B., Yu, J.Y., Deng, Y., Tang, Z., Ding, S.Y.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.12.2013; Elsevier
• Subjects: AC losses; Alternating current; Applied sciences; Barriers; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Critical currents; CURRENT DENSITY; Dipping; Electrical engineering. Electrical power engineering; Exact sciences and technology; Flux creep; MAGNETIC FIELD; Magnetic fields; Materials; MATHEMATICAL ANALYSIS; Mathematical models; Physics; Properties of type I and type II superconductors; Silver; Superconducting tapes; SUPERCONDUCTIVITY; SUPERCONDUCTORS; Surface barrier; TAPE; Vortex lattices ,flux pinning, flux creep; AC losses; Surface barrier; Flux creep; Magnetic field effect; Silver; Critical current density; Superconducting tapes; Bismuth Calcium Copper Strontium Oxides Mixed; High temperature superconductor; Magnetic susceptibility
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/j.physc.2013.07.002

•Surface barrier effects on AC loss were studied by simulations.•Surface and bulk region is characterized by different critical current density.•Simulation results are similar to the experimental results. Influences of surface barrier in Ag–Bi2223 tapes on AC loss are studied. The Ag–Bi2223 tape is described by a surface region (near to the silver) and a bulk region, which are depicted by different critical current densities jcs and jcb, respectively. Simulations using the flux creep model indicate that with surface barrier increasing, a kink then a dip appear in the AC loss and the peak and dip positions move to higher magnetic fields. The results can be used as an effective method to qualitatively estimate the surface barrier strength.