| 摘要 |
A magnetic head device includes a magnetic head section having a first free layer with a magnetization orientation that is not previously defined but changes depending upon only external magnetic field applied, a second free layer with a magnetization orientation that is not previously defined but changes depending upon only external magnetic field applied, a nonmagnetic intermediate layer sandwiched between the first free layer and the second free layer, a first electrode layer stacked on a surface of the first free layer opposite to the nonmagnetic intermediate layer, and a second electrode layer stacked on a surface of the second free layer opposite to the nonmagnetic intermediate layer; a sense-current supply means for flowing a sense current across the first electrode layer and the second electrode layer of the magnetic head section; and a frequency divider circuit for dividing by two a frequency of an output signal produced across the first electrode layer and the second electrode layer of the magnetic head section.
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