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.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2003 Jan 1|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics