2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/23628We propose a general theory of the spin-transfer effects that occur when current flows through inhomogeneous magnetic systems. Our theory does not rest on an appeal to conservation of total spin, can assess whether or not current-induced magnetization precession and switching in a particular geometry will occur coherently, and can estimate the efficacy of spin-transfer when spin-orbit interactions are present. We illustrate our theory by applying it to a toy-model two-dimensional-electron-gas ferromagnet with Rashba spin-orbit interactions.4 pages, 3 figuresMesoscale and Nanoscale PhysicsMaterials Sciencetext