Title :
Material properties and domain structure influence on pole erasure occurrence in perpendicular recording heads
Author :
Hirata, Kei ; Roppongi, Tetsuya ; Ohtsuki, Mitsuo ; Yamaguchi, Atsushi ; Noguchi, Kiyoshi
Author_Institution :
Head Bus. Group, TDK Corp., Nagano, Japan
Abstract :
The influence of the material properties and the domain structure of the yoke on pole erasure was investigated. A writer pole material with high anisotropy field (Hk) can suppress pole erasure because it can create a 180° domain wall parallel to the head transverse direction. One of the causes of the pole erasure is due to the induced magnetic anisotropy in the pole tip region by the magnetoelastic effect.
Keywords :
magnetic domain walls; magnetic heads; magnetoelastic effects; perpendicular magnetic anisotropy; perpendicular magnetic recording; anisotropy field; domain structure; domain wall; magnetic anisotropy; magnetoelastic effect; material property; perpendicular magnetic recording heads; pole erasure; writer pole material; Antiferromagnetic materials; Magnetic anisotropy; Magnetic domain walls; Magnetic domains; Magnetic heads; Magnetic materials; Material properties; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Scanning electron microscopy; Domain structure; magnetoelastic effect; perpendicular magnetic recording head; pole erasure;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.855308
