Effect of buffer layer, annealing and composition on inverse giant magneto-resistance (GMR) arising from negative spin polarization of Fe_xCr_(1-x)

摘要

Microwave assisted magnetic recording (MAMR) is expected to overcome the areal density limit of the current perpendicular magnetic recording technology. It relies on the energy assist from ac magnetic field generated from a spin torque oscillator (STO) placed in the vicinity of the write head. For this STO to generate sufficient frequency and energy of the ac magnetic field with small dc current density, a suitable choice of materials for spin injection layer (SIL) and field generating layer (FGL) is necessary.