Patent ID: 8922949

Claim:
A magnetic recording head comprising: a main magnetic pole configured to apply a recording magnetic field to a magnetic recording medium; an auxiliary magnetic pole configured to structure a magnetic circuit in conjunction with the main magnetic pole; and a laminated oscillator between the main magnetic pole and auxiliary magnetic pole, the laminated oscillator configured to supply current from the main magnetic pole to the auxiliary magnetic pole, wherein the laminated oscillator has a junction area perpendicular to a current-carrying direction, which is smaller than that of the main magnetic pole, the laminated oscillator includes the following layers laminated from the main magnetic pole side in the following order; a second magnetic layer having a coercive force smaller than a magnetic field applied from the main magnetic pole and having a magnetic field generated by micro wave oscillation, a first magnetic layer formed of a metal different from that of the second magnetic layer and configured to inject spin transfer torque into the second magnetic layer, and a non-magnetic intermediate layer configured to cut a direct magnetic coupling between the first magnetic layer and the second magnetic layer, a cooling/heating material is interposed between the laminated oscillator and the main magnetic pole, and the cooling/heating material includes the following layers laminated from the laminated oscillator side in the following order; a first thermoelectric material layer having the same junction area as that of the laminated oscillator, a first metal material layer having the same junction area as that of the laminated oscillator, a second metal material layer having the same junction area as that of the main magnetic pole, and a second thermoelectric material layer having the same junction area as that of the main magnetic pole.