Quantitative model for TMR and spin-transfer torque in MTJ devices

摘要

We present a Non-Equilibrium Green''s Function (NEGF)-based model for spin torque transfer (STT) devices which provides qualitative as well as quantitative agreement with experimentally measured (1) differential resistances, (2) Magnetoresistance (MR), (3) In-plane torque (τ∥) and (4) out-of-plane torque (τ⊥) over a range of bias voltages, using a single set of three adjustable parameters. We believe our model is able to cover this diverse range of experiments.