公开(公告)号：DE2620657A1

公开(公告)日：1977-02-10

申请号：DE2620657

申请日：1976-05-11

Applicant: IBM

Inventor： MAZZEO NICKOLAS JOSEPH ,  THOMPSON DAVID ALLEN

IPC: G11C11/14 ,  G01R15/14 ,  G01R33/02 ,  G01R33/09 ,  G11B5/37 ,  G11B5/39 ,  G11C19/08 ,  H01H36/00 ,  G11B5/30

Abstract: A thin film magnetoresistive sensor of NiFeCo is juxtaposed with a saturable thin film shield of more highly permeable NiFe material. The curve depicting change of resistance of the sensor as a function of applied magnetic field is flattened, permitting the sensor to provide a magnetic switch, such as a keyboard transducer, a sensor of current through wires, a magnetic bubble detector and a remote control scanning sensor in a recording head. The scanner involves a stepped arrangement for providing different levels of sensitivity for adjacent sections of the magnetoresistive sensor.