MICRO MAGNETIC HEAD

摘要

PURPOSE:To obtain a micro magnetic head which can control the direction of magnetization within a magnetic domain in a magnetic thin film, by applying a bias magnetic field to the head. CONSTITUTION:A micro head core 11-1 consisting of a magnetic thin film is magnetized by a signal magnetic field given from a recording medium. Then a bias current 13-2 is flowed to the core 11-1 together with application of a magnetic field higher than an anisotropic magnetic field. Thus the head magnetization is saturated evenly in the axis direction 15-1 easy for magnetization. Under such conditions, a right-turned magnetic field 15-2 leaked out of a recording medium is applied to set the bias magnetic field at zero. Thus a magnetic domain of the head tip part has the right-turned magnetization. While said magnetic domain has left-turned magnetization if a left-turned magnetic field 15-3 leaked out of the recording medium together with the bias magnetic field set at zero. Thus the direction of magnetization is controlled within the magnetic domain at the head tip part and then reproduced.