Method for judging coercive force of magnetic recording medium

摘要

A method for judging a coercive force of a magnetic recording medium, so recording magnetic information can be formed in either a low coercivity magnetic medium or a high coercivity magnetic medium by using a magnetic head. A magnetic information recording step writes magnetic information in the magnetic recording medium by alternately using a first write current suitable for writing in the low coercivity magnetic medium and a second write current suitable for writing in the high coercivity magnetic medium. A magnetic information reproducing step reproduces the magnetic information written in the magnetic recording medium. A judging step makes a judgment on a coercive force of the magnetic recording medium by way of comparing a first reproduced output A of the magnetic information written with the first write current and a second reproduced output B of the magnetic information written with the second write current.

主权项

1. A method for judging a coercive force of a magnetic recording medium, in order for recording magnetic information to be formed in either a low coercivity magnetic medium or a high coercivity magnetic medium by using a magnetic head, the method comprising:
a magnetic information recording step comprising writing magnetic information in the magnetic recording medium by alternately using a first write current sufficient to write magnetic information in a low coercivity magnetic medium, and a second write current sufficient to write magnetic information in a high coercivity magnetic medium; a magnetic information reproducing step comprising reproducing the magnetic information written in the magnetic recording medium; and a judging step comprising making a judgment on a coercive force of the magnetic recording medium by way of comparing a first reproduced output of the magnetic information written with the first write current and a second reproduced output of the magnetic information written with the second write current; wherein the magnetic information recording step further comprises:
segmenting a magnetic record area, where magnetic information of the magnetic recording medium is recorded, in its longitudinal direction into comparison zones;wherein the magnetic information is written in the magnetic record area by alternately using the first write current and the second write current with respect to each of the segmented comparison zones.