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    High-density magnetic recording scheme
    7.
    发明授权
    High-density magnetic recording scheme 失效
    高密度磁记录方案

    公开(公告)号：US3564558A

    公开(公告)日：1971-02-16

    申请号：US3564558D

    申请日：1968-08-26

    申请人： SPERRY RAND CORP

    发明人： TOLMAN CHARLES H ,  OBERG PAUL E ,  PAUL MAYNARD C

    IPC分类号： G11B5/09 ,  G11B5/31 ,  G11B5/49 ,  G11B5/16 ,  G11B5/02 ,  G11B5/30

    CPC分类号： G11B5/09 ,  G11B5/31 ,  G11B5/4976 ,  Y10T29/49021

    摘要： A METHOD OF HIGH-DENSITY MAGNETIC RECORDING USING A MAGNETIC RECORDING HEAD HAVING A RECORDING GAP THAT IS INCUDTIVELY COUPLED TO A RELATIVELY MOVING OR STATIONARY THIN-FERROMAGNETIC-FILM RECORDING MEDIUM OF A THICKNESS THAT IS INSUFFICIENT TO SUPPORT BLOCK WALLS, I.E., CAN ONLY SUPPORT NEEL WALLS, BETWEEN ADJACENT DOMAINS AND HAVING AN EASY AXIS THAT IS ORTHOGONAL TO THE DIRECTION OF RELATIVE MOVEMENT OR PARALLEL TO THE RECORDING GAP. THE RECORDING MEDIUM''S INTERDOMAIN NEEL WALLS ARE FORMED WITH THE MAGNETIZATION WITHIN THE WALLS HAVING THE SAME DIRECTIONA ROTATIONAL, I.E., WINDING, SENSE, E.G., CLOCKWISE OR COUNTERCLOCKWISE, BY APPLYING FIRST OR SECOND AND OPPOSITE POLARITY ORTHOGONAL FIELDS HL AND JT IN THE RECORDING GAP.