2008/09/25 by Paul M. Haney, Christian Heiliger, Mark D. Stiles +1 · 40 citations
Chemistry · Engineering · Mathematics · Physics and Astronomy · #Advanced Memory and Neural Computing #Biasing #Chemistry #Condensed matter physics #Coupling (piping) #Exchange bias #Function (biology) #Magnetic anisotropy #Magnetic field #Magnetic properties of thin films #Magnetization #Materials science #Mathematics #Physics #Quadratic equation #Quantum and electron transport phenomena #Quantum mechanics #Quantum tunnelling #Spin (aerodynamics) #Thermodynamics #Voltage #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.79.054405
published in Physical Review B 79(5) (American Physical Society) · 10 pages, 8 figures
arxiv created 2008/09/25 · openalex publication_date 2009/02/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study how a bias voltage changes magnetic exchange interactions. We derive a general expression for magnetic exchange interactions for systems coupled to reservoirs under a bias potential and apply it to spin valves. We find that for metallic systems, the interlayer exchange coupling shows a weak oscillatory dependence on the bias potential. For tunneling systems, we find a quadratic dependence on the bias potential and derive an approximate expression for this bias dependence for a toy model. We give general conditions for when the interlayer exchange coupling is a quadratic function of bias potential.