MRヘッド再生出力の素子高さ, 膜厚依存性

抄録

  To take full advantage of the high output of MR head, it is important to optimize the head parameters. Several researchers have calculated the response of an MR element to an external field, but have not devoted sufficient attention to comparing the calculation results and the head characteristics. We investigated an SAL-biased MR head with the design parameters of element height, film thickness, gap length, and flying height, both theoretically and experimentally. The saturation of the head output with the sensing current is well explained by the sensing current density. The average magnetic flux density on the element height increases with a smaller element height. The ratio of the head output to the average magnetic flux density and the sensing current density is almost constant for the element height.