Abstract
We propose a system for analyzing the magnetic field of a magnetic head, taking account of the residual stress distribution. This simulation system is composed of three analytic parts: a thermal stress distribution analysis part, a permeability distribution analysis part and a magnetic field analysis part. The system was applied to ametal-in-gap-type magnetic head in order to investigate the effect of residual stress on the recording characteristics. We assumed that the stress was caused by the difference in the thermal expansion coefficients of the constituent materials. The permeability reaches a maximum for an optimum combination of thermal expansion coefficients, which are different for ferrite, thin magnetic metal film and bonding glass. The calculated output agrees well with the measured output. Use of the system optimizes the magnetic head in terms of the residual stress.
