Patent ID: 7982996

Claim:
A microwave-assisted magnetic recording (MAMR) write head for magnetizing regions in a perpendicular magnetic recording layer, the write head comprising: a write pole; an electrically conductive coil coupled to the write pole, the write pole generating a magnetic write field in the presence of electrical write current through the coil; a trailing shield of magnetically permeable material for altering the angle of the write field; and a spin torque oscillator (STO) between the write pole and the trailing shield and comprising a ferromagnetic polarizer, a free ferromagnetic layer having a magnetization that rotationally oscillates in the presence of an electrical current through the free layer to thereby generate an oscillating magnetic field to assist the magnetic field from the write pole, and a nonmagnetic electrically conductive spacer between the polarizer and free layer, the polarizer having a magnetization, in the presence of the write field from the write pole, oriented at an angle greater than 20 degrees and less than 80 degrees from the normal to the plane parallel to the free layer.