Abstract
Magnetic domain structures in a magnetic head of a hard disk drive were observed by strain imaging. When a magnetic material is subjected to an external magnetic field, a strain is generated in the material. We can observe domain structures by imaging the strain using a scanning probe microscope. We proved by strain imaging of the magnetic head that magnetic structures in the top pole tip of the writing head were divided into two domains by the center axis, and the boundary was split in the interface between the sputtering and plating layers. The structures in the deep portions of the pole appeared in the images. These images were formed by the strains caused by magnetic forces.
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