System for evaluating the play back of magnetoresistive heads

Details System for evaluating the play back of magnetoresistive heads System for evaluating the play back of magnetoresistive heads

1997-03-24

1999-07-20

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Magnetic information storage element testing

324537, G11B 5455, G11B 539, G01R 3100

Patent

active

059260190

ABSTRACT:
For evaluating Barkhausen noise of a magnetoresistive head in a frequency range where it is used for read/write of recording media, in an inspection device of a magnetoresistive head (10) of the invention having an external magnetic field generator (1) for applying an external magnetic field to a magnetoresistive element (11) of the magnetoresistive head, and a noise measurement section (2) for evaluating noise of a signal output of the magnetoresistive element according to the external magnetic field, an inductive head (20) is applied in the external magnetic field generator for generating the external magnetic field.

REFERENCES:
patent: 3706926 (1972-12-01), Barrager et al.
patent: 5517111 (1996-05-01), Shelor

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