Differential magnetoresistive effect head and magnetic recording/reading device

A differential magnetoresistive effect element comprising:

• a first magnetoresistive effect element having:
• a first pinning layer;
• a first intermediate layer;
• and
• a first free layer;
• and
• a second magnetoresistive effect element stacked via a spacer layer above the first magnetoresistive effect element, the second magnetoresistive effect element having:
• a second pinning layer;
• a second intermediate layer;
• and
• a second free layer;
• wherein the first magnetoresistive effect element and the second magnetoresistive effect element show in-opposite-phase resistance change in response to a magnetic field in the same direction, and
• wherein ti2<ti1 when a thickness of the first intermediate layer is ti1, and a thickness of the second intermediate layer is ti2.

A magnetic recording/reading device, comprising:

• a magnetic recording medium;
• a medium drive section that drives the magnetic recording medium;
• and
• a magnetic head, the magnetic head having:
• a recording head;
• a head drive section that positions the magnetic head onto a desired track of the magnetic recording medium;
• and
• a read head, the read head including a differential magnetoresistive effect element, the differential magnetoresistive effect element comprising:
• a first magnetoresistive effect element having:
• a first pinning layer;
• a first intermediate layer;
• and
• a first free layer;
• and
• a second magnetoresistive effect element stacked via a spacer layer above the first magnetoresistive effect element, the second magnetoresistive effect element having:
• a second pinning layer;
• a second intermediate layer;
• and
• a second free layer;
• wherein the first magnetoresistive effect element and the second magnetoresistive effect element show in-opposite-phase resistance change in response to a magnetic field in the same direction, and
• wherein tp2>tp1 is satisfied when a thickness of the first pinning layer is tp1, and a thickness of the second pinning layer is tp2.