Flux-Pinning Property of REBCO Superconducting Thick Film with Artificial Pinning Center

• Speaker: Prof. Kang, Byeongwon (Chungbuk National Univ.)
• Date: Wednesday May 23, 2018 05:00pm
• Place: BK Seminar

Addition of pinning centers is reported to be an effective technique to enhance the flux pinning properties of REBCO superconductors. The flux-pinning properties of pulsed laser deposited GdBa2Cu3O7- (GdBCO) films with the addition of BaSnO3 (BSO) nanostructured defects were studied for power application. Magnetization measurements showed that the critical current densities (Jcs) of BSO-doped GdBCO films were drastically enhanced in comparison with those of pure GdBCO films. In addition, a strong thickness dependence of Jc of pure GdBCO films was found to be greatly improved with the BSO addition. The improvement in the pinning properties was attributed to the growth of BSO nanostructured defects, which consisted of nanorods and nanoparticles, characterized by using the cross-sectional transmission electron microscopy (TEM). This technique could be applied to the development of thick GdBCO films in which high Jc values need to be maintained.