| 摘要 |
PURPOSE:To eliminate a Barkhausen noise generated by a magnetic wall movement by constituting the titled magnetic head so that a part pinched by a sense current use lead wire of a magneto-resistance element for constituting a reproducing head utilizing a magneto-resistance effect of a ferromagnetic thin film has a single magnetic domain structure in a state that a leakage magnetic field from a recording medium has been applied. CONSTITUTION:As for a pattern shape of an MR element vapor-depositing a permalloy wall to a thickness of 0.03mum by applying a magnetic field in the longitudinal direction, its length L and width W are 72mum, and 9mum, respectively, and two kinds of patterns whose distances between insides of a lead wire 6 for a sense current flowing to an MR element 5 which has been formed by Au/Cr are 42mum and 50mum are used. The formed thin film magnetic head is brought to fixed magnetic field annealing in a vacuum in the longitudinal direction of the MR element, and subsequently, it is cooled slowly to a room temperature in a rotating magnetic field. After the annealing, a protective glass is stuck by a resin and a lapping head of a cylindrical tip is manufactured. As for the head which is manufactured in this way, the MR element becomes a single magnetic domain structure between lead values, therefore, a Barkhausen noise caused by a magnetic wall movement is not generated.
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