Spin-torque oscillator with multilayer seed layer between the write pole and the free layer in a magnetic recording write head

A magnetic recording write head, comprising:

• a main pole,
• a nonmagnetic electrically conductive seed means removing spin polarization from electrons flowing from the main pole and interfacing with a spin polarization layer of a spin torque oscillator device, wherein the nonmagnetic electrically conductive seed means comprises Mn;
• a ferromagnetic free layer;
• and
• a trailing shield over the spin torque oscillator device.

A magnetic recording write head, comprising:

• a main pole,
• a nonmagnetic electrically conductive seed layer on the main pole, a nonmagnetic electrically conductive seed layer comprising a Mn layer or a Mn alloy layer of Mn and one or more of Ir, Pt, Ni, Fe, Pd, Rh, Cu, Ta, Cr, Ru, Hf and Nb;
• a trailing shield;
• a ferromagnetic free layer between the nonmagnetic electrically conductive seed layer and the trailing shield;
• and
• two or more polarizers selected from the group consisting of a trailing shield polarizer layer, a polarizer layer between the free layer and the trailing shield, and a polarizer layer between nonmagnetic electrically conductive seed layer and the free layer.