Izvorni znanstveni članak
The origin of the surface field enhanced coercive field in nanophase Fe73.5Cu1Nb3Si15.5B7 ribbon
Stjepan Sabolek
; Department of Physics, Faculty of Science, University of Zagreb, Bijenička 32, 10 000 Zagreb, Croatia
Emil Babić
; Department of Physics, Faculty of Science, University of Zagreb, Bijenička 32, 10 000 Zagreb, Croatia
Ivica Kušević
; Department of Physics, Faculty of Science, University of Zagreb, Bijenička 32, 10 000 Zagreb, Croatia
Marko Šušak
; Department of Physics, Faculty of Science, University of Zagreb, Bijenička 32, 10 000 Zagreb, Croatia
Dario Posedel
; Department of Physics, Faculty of Science, University of Zagreb, Bijenička 32, 10 000 Zagreb, Croatia
Denis Stanić
; Department of Physics, Faculty of Science, University of Zagreb, Bijenička 32, 10 000 Zagreb, Croatia
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 with 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 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.
Ključne riječi
Fe73.5Cu1Nb3Si15.5B7; amorphous and nanocrystalline; hysteresis loop; domain structure; domain wall pinning; coercive field; core current
Hrčak ID:
302011
URI
Datum izdavanja:
1.3.2006.
Posjeta: 209 *