The origin of the surface field enhanced coercive field in nanophase Fe_73.5Cu_1Nb_3Si_15.5B_7 ribbon

Sabolek, Stjepan and Babić, Emil and Kušević, Ivica and Šušak, Marko and Posedel, Dario and Stanić, Denis (2006) The origin of the surface field enhanced coercive field in nanophase Fe_73.5Cu_1Nb_3Si_15.5B_7 ribbon. Fizika A, 15 (1). pp. 1-16. ISSN 1330-0008

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Abstract

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 with 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 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 H_p on the performance of such ribbons is briefly discussed and some procedures which can prevent these effects are proposed.

Item Type: Article
Keywords: amorphous and nanocrystalline, hysteresis loop, domain structure, domain wall pinning, coercive field, core current
Date: 2006
Subjects: NATURAL SCIENCES > Physics
Divisions: Faculty of Science > Department of Physics
Publisher: Hrvatsko fizikalno društvo
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 15 Apr 2014 17:45
Last Modified: 15 Apr 2014 17:46
URI: http://digre.pmf.unizg.hr/id/eprint/859

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