DC magnetization of ferromagnetic amorphous wires with local deformation


Kamer O., Erdogan M.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, cilt.312, ss.21-26, 2007 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 312 Konu: 1
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1016/j.jmmm.2006.09.003
  • Dergi Adı: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
  • Sayfa Sayıları: ss.21-26

Özet

Experimental DC (VSM) and theoretical hysteresis loops of a ferromagnetic amorphous wire with a deformation in the middle or exposed to local magnetic fields are investigated. Hysteresis loops show two-stage Barkhausen jumps and staircase relaxation. With a local field at the same position, the loop drastically loses its shape and symmetry depending on the magnitude and the direction of the magnetic bias. A model to explain this behavior is proposed. The proposed model is based on the calculation of the magnetic moment distribution of the domain as a result of domain wall motion and nucleation in the inner core of a ferromagnetic wire and is in a good agreement with the experimental results. (C) 2006 Elsevier B.V. All rights reserved.