Influence of crossed fields in structures combining large grain, bulk (RE)BCO superconductors and soft ferromagnetic discs

9th International Workshop on Processing and Applications of Superconducting (RE)BCO Large Grain Materials

物理学;材料科学

Philippe, M.P.^1 ; Fagnard, J.F.^1 ; Wéra, L.^1 ; Morita, M.^2 ; Nariki, S.^2 ; Teshima, H.^2 ; Caps, H.^3 ; Vanderheyden, B.^1 ; Vanderbemden, P.^1

University of Liège, Department of Electrical Engineering and Computer Science (B28), Sart-Tilman, Liège

B-4000, Belgium^1

Nippon Steel and Sumitomo Metal Corporation, Shintomi 20-1, Futtsu, Chiba

293-8511, Japan^2

University of Liège, GRASP, Physics Department (B5), Liège

B-4000, Belgium^3

关键词: Applied field;    Crossed fields;    Engineering applications;    Magnetic behaviour;    Rotating machine;    Soft ferromagnetic;    Transverse field;    Trapped field magnet;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/695/1/012003/pdf
DOI  :  10.1088/1742-6596/695/1/012003

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Bulk (RE)BCO superconductors are able to trap record magnetic fields and can be used as powerful permanent magnets in various engineering applications such as rotating machines and magnetic bearings. When such superconducting (SC) "trapped field magnets" are combined to a ferromagnetic (FM) disc, the total magnetic moment is increased with respect to that of the superconductor alone. In the present work, we study experimentally the magnetic behaviour of such hybrid FM/SC structures when they are subjected to cycles of applied field that are orthogonal to their permanent magnetization, i.e. a "crossed-field" configuration. Experimental results show that the usual "crossed-field demagnetization" caused by the cycles of transverse field is strongly reduced in the presence of the ferromagnet.