Thin film head having a core comprising Fe-N-O in a specific atomic composition ratio

摘要

A magnetic thin film head includes a soft magnetic alloy thin film having in a composition expressed by the formula FeXNYOZ, wherein each of X, Y and Z represents an atomic composition ratio, and preferably having four phases including an iron oxide expressed as Fe2O3, iron nitrides expressed as Fe4N and Fe3N respectively, and alpha -Fe. X, Y and Z appearing in the composition formula are preferably in the following relations:0.005