Domain nucleation in hard/soft ferromagnetic bilayers with exchange coupling through a pinhole

E. Saitoh, T. Nakamura, H. Matsumoto, H. Miyajima

Research output: Contribution to journalArticle

Abstract

The magnetization process has been investigated for SmCo5/SiO2/Fe19Ni81 trilayer films, in which the exchange coupling between the hard-ferromagnetic SmCo5 layer and the soft-ferromagnetic Fe19Ni81 layer is controlled by the dimension of a small pinhole (10–100 μm in diameter) penetrating the SiO2 layer. The magnetization curves and magnetic torque curves indicate that the magnetization reversal in the SmCo5 layer consists of a nucleation around the pinhole and the propagation of the domain wall. This is responsible for the suppression of the coercivity induced by the coupling through the pinhole.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number1
DOIs
Publication statusPublished - 2003 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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