Naslov
The origin of the surface field enhanced coercive field in nanophase Fe73.5Cu1Nb3Si15.5B7 ribbon

Autori
Sabolek, Stjepan ; Babić, Emil ; Kušević, Ivica ; Šušak, Marko ; Stanić, Denis

Izvornik
Fizika A & B (1333-8390) 15 (2006), 1; 1-16

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Hysteresis loop ; Domain structure ; Domain wall pinning ; Coercive field ; Core current

Sažetak
The influence of surface fields Hp (generated with either direct or alternating core-current) on soft magnetic properties of amorphous and nanocrystalline Fe73.5Cu1Nb3Si15.5B7 ribbon has been studied. While in amorphous ribbon the coercive field Hc decreases with Hp, in the same optimally annealed ribbon (Hc = 1.3 A/m, Mm  Ms) Hc increases with Hp and the hysteresis loss E decreases with Hp for all explored types of Hp (static and dynamic with different phases in respect to that of the magnetizing field H). The unexpected increase of Hc in nanocrystalline ribbon is associated to the influence of Hp on the surface and main (inner) domain structure. The model is developed which takes into account this interaction and explains all the experimental results. The probable adverse effect of the external fields with configurations similar to those of Hp on the performance of such ribbons is briefly discussed and some procedures which can prevent these effects are proposed.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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