Thin film magnetic heads.

摘要

A thin film magnetic head is characterised by the use of a substrate predominantly comprising zirconia. In preferred embodiments, the substrate is a ceramic compact comprising 4 to 45% by volume of a component A, 55 to 96% by volume of a component Band at most 3% by volume of unavoidable impurities, wherein component A is at least one member selected from the group consisting of carbides, nitrides, carbonitrides, carboxides, oxynitrides and carboxynitrides of Group IVa, Va and VIa elements of Periodic Table and mixtures or solid solutions thereof, and component B is ZrO2 consisting of at least 70% by weight of tetragonal and/or cubic zirconia, the balance being monoclinic zirconia. Preferably at least one member selected from the group consisting of oxides of Group IIIa elements of Periodic Table, CaO and MgO, and mixtures thereof is dissolved to form a solid solution.