A PLAYBACK HEAD FOR PERPENDICULAR MAGNETIC RECORDINGS

摘要

A magneto-resitive playback head and a recording and reproducing device for reproducing a recording signal from a double-layered film type perpendicular magnetic recording medium. The playback head includes a magneto-resistive element included in high-permeability thin films and having one end portion facing the recording medium. The magneto-resistive element exhibits a magneto-resistance effect responsive to magnetic fluxes generated from signal magnetization in the recording medium. The head also includes electrodes for supplying an electric current longitudinally of the magneto-resistive element, and high-permeability members for introducing the signal magnetic fluxes passed through the magneto-resistive element again to the recording medium. A magnetic recording and reproducing device comprises the playback head, a thin film magnetic recording head, a recording circuit, a playback circuit, and a driving circuit which gives a relative motion between the medium and the heads.