In situ investigation of the magnetic domain wall in Permalloy thin film by Lorentz electron microscopy

摘要

We reported in situ investigation of the magnetic domains in Permalloy thin film with the out-of-focus methods of Lorentz microscopy. The perpendicular magnetic field to the foil is produced by the objective lens current. The component of the magnetic field, parallel to the foil plane, is applied in a novel way, simply by tilting the specimen. The circle Bloch line movements along the main wall between two cross-tie walls under the influence of a hard-axis field normal to the wall and a variation of the main wall curvature by buckling of located parts of the wall under the influence of an easy-axis field parallel to the wall has been in situ observed.