超伝導メカニカルシステムにおける超伝導体の磁化特性のモデリング

概要

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High-T_c superconductors with strong pinning effect are being applied to a variety of superconducting mechanical systems. Studies of magnetization characteristics of the superconductors being used in the superconducting mechanical systems are urgently required to make optimum use of the high performance of high-T_c superconductors, i.e., large magnetization, high magnetic flux density, and strong magnetic force promoted by the pinning effect. This report reviews macroscopic models, such as Bean's critical state model and its variations, which have been used for analyzing the magnetic characteristics of superconductors. Then we introduce novel mesoscopic models named the dragged spring model, which provides a simple and convenient way of understanding the performance of the pinning effect, and the dragged magnetic-field model, which provides much better results in the analysis of the magnetization curve of high-T_c superconductors.
社団法人日本磁気学会の論文
2004-12-01