Patent ID: 7986481

Claim:
A magnetic reproducing method comprising the steps of: heating a magnetoresistive effect element for reading data signals, and having an output with a Barkhausen noise due to a low temperature of said magnetoresistive effect element; and performing a read operation by using said magnetoresistive effect element under condition that said magnetoresistive effect element is increased in temperature and thus the Barkhausen noise is reduced, wherein the output of said magnetoresistive effect element is measured, and said magnetoresistive effect element is heated until the Barkhausen noise in the measured output is reduced, while a thin-film magnetic head comprising said magnetoresistive effect element is flying above a rotating magnetic recording medium, the Barkhausen noise being judged to be reduced when a noise count profile of the measured output of the magnetoresistive effect element has substantially a trapezoidal shape, the noise count profile representing a relation between a normalized value nC N of noise counts C N and a normalized value of nv TH of threshold voltages v TH , where C N is the number of times that a noise signal crosses each of different set threshold voltages v TH in a predetermined period of time T MEAS .