Naslov
Core current enhanced domain wall pinning in nanocrystalline Fe_73.5Cu_1Nb_3Si_15.5B_7 ribbon

Autori
Sabolek, Stjepan ; Babić, Emil ; Posedel, Dario ; Šušak, Marko

Izvornik
IEEE transactions on magnetics (0018-9464) 40 (2004), 5; 3352-3357

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

Ključne riječi
domain wall pinning; coercive field; M-H loops

Sažetak
We have studied the influence of surface fields H_p (generated with either direct or alternating core current) on soft magnetic properties of amorphous and nanocrystalline Fe_73.5Cu_1Nb_3Si_15.5B_7 ribbon has been studied. While in amorphous ribbon the coercive field H_c decreases with H_p, in the same optimally annealed ribbon (H_c=1.3 A/m, M_m=M_s) H_c increases with H_p and the hysteresis loss E decreases with H_p for all explored types of H_p (static and dynamic with different phases in respect to that of the magnetizing field H). The unexpected increase of H_c in nanocrystalline ribbon is associated to the influence of H_p on the surface domains and the interaction between 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 effects of the external fields with configurations similar to those H_p on the performance of such ribbon is briefly discussed and some procedures which can prevent such effects are proposed.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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