2006/06/26 by Sayeef Salahuddin, Salahuddin, Sayeef, Supriyo Datta +1
Chemistry · Materials Science · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Chemical and Physical Properties of Materials #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum and electron transport phenomena
paper · pdf · doi:10.48550/arxiv.cond-mat/0606648
openalex publication_date 2006/06/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present here a self consistent solution of quantum transport, using the Non Equilibrium Green's Function (NEGF) method, and magnetization dynamics, using the Landau-Lifshitz-Gilbert (LLG) formulation. We have applied this model to study current induced magnetic switching due to `spin torque' in a device where the electronic transport is ballistic and the free magnetic layer is sandwiched between two anti-parallel ferromagnetic contacts. The device shows clear hysteretic current-voltage characteristics, at room temperature, with a sharp transition between the bistable states and hence can be used as a non-volatile memory. We show that the proposed design may allow reducing the switching current by an order of magnitude.