Abstract

Magnetic domain structure change under a magnetic field across the length of an MR element (transverse magnetization) was observed in detail by Lorentz electron microscopy for a sample whose size was the same as that of the actual element, l0 × 100 μm2. Various magnetic field were applied through the objective lens of the electron microscope utilized. During the magnetization process, the element retained a single magnetic domain structure while non-uniform rotation of the magnetization took place within the domain. The transfomation from the nonuniform to uniform rotation of the magnetization upon the application of a longitudinal bias field was confirmed.

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