Patent ID: 8564904

Claim:
A magnetic head comprising a reproducing section configured to detect a medium magnetic field recorded in a magnetic recording medium, the reproducing section including: a stacked film including: a first magnetization layer having a perpendicular magnetic anisotropy, a magnetization of the first magnetization layer being fixed; and a second magnetization layer stacked with the first magnetization layer along a first axis and configured to oscillate, the second magnetization layer having a perpendicular magnetic anisotropy; and a magnetic field application unit stacked with the stacked film along the first axis and configured to apply a bias magnetic field having a component along the first axis to the stacked film, a resistance of the stacked film being configured to change in accordance with the medium magnetic field when a current not less than a value at which the second magnetization layer oscillates is passed between the first magnetization layer and the second magnetization layer.