Title :
Write performance of heads with a 2.1-Tesla CoNiFe pole
Author :
Ohashi, Keishi ; Morita, Noboru ; Tsuda, Tadaaki ; Nonaka, Yoshihiro
Author_Institution :
NEC Corp., Tokyo, Japan
fDate :
9/1/1999 12:00:00 AM
Abstract :
We examined the write performance of heads with a CoNiFe/NiFe composite write pole. The saturation induction Bs of the CoNiFe film was 2.1 T (21 kG). The CoNiFe layer thickness was typically 0.5-0.6 μm, and the rest of the write pole was composed of Ni80 Fe20. The dual high Bs layer structure with the CoNiFe films on both sides of the write gap gave excellent overwrite performance. It was over 30 dB for a medium that had a high coercivity of 560 kA/m (7.0 kOe)
Keywords :
cobalt alloys; coercive force; iron alloys; magnetic heads; magnetic thin films; nickel alloys; soft magnetic materials; 0.5 to 0.6 micron; 2.1 T; CoNiFe; CoNiFe-NiFe; CoNiFe/NiFe composite write pole; Permalloy core; coercivity; flying height; high density magnetic recording; magnetostriction; overwrite performance; relative permeability; saturation induction; soft magnetic material; write heads; write instability; write performance; Coercive force; Corrosion; Magnetic anisotropy; Magnetic cores; Magnetic films; Magnetic heads; Magnetic materials; Magnetic properties; Magnetic recording; Soft magnetic materials;
Journal_Title :
Magnetics, IEEE Transactions on
