Micromagnetic model simulation of spin-torque oscillator and write head for microwave-assisted magnetic recording — Spin injection layer with in-plane anisotropy

Micromagnetic simulations were carried out to obtain stable oscillation of a spin transfer torque oscillator (STO) inserted into the gap between the main pole and trailing shield of a write head. We assumed a spin injection layer with in-plane anisotropy. Results show that reducing the magnetostatic interaction between the write head and the STO is the key to obtaining stable STO oscillation.