engleski

The influence of surface domains on magnetization of very soft magnetic ribbons

The influence of surface fields Hp (generated by core currents) on the parameters of M-H loops (the coer-cive field Hc, the maximum magnetization Mm, etc.) of amorphous and nanocrystalline Fe73.5Cu1Nb3Si15.5B7 ribbon and amorphous VITROVAC 6025Z ribbon has been investigated. In amor-phous Fe73.5Cu1Nb3Si15.5B7 ribbon Hc decreases with Hp with unchanged Mm, whereas in nanocrystalline Fe73.5Cu1Nb3Si15.5B7 and VITROVAC 6025Z ribbons Hc increases with Hp and Mm decreases with Hp. This unusual increase of Hc with Hp is ascribed to the influence of Hp on the surface domain structure (SDS) and strong interaction between SDS and inner (main) domain structure (MDS) in these materials.

coercive field ; hysterezis loop ; domain wall pinning

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