Einstein–de Haas effect at radio frequencies in and near magnetic equilibrium
Keiichi Mori, M. G. Dunsmore, Joseph E. Losby, D. M. Jenson, M. Belov, M. R. Freeman
Abstract
Einstein--de Haas (EdH) experiments, originally for measuring the ratio of magnetic moment to intrinsic angular momentum in magnetic materials, enjoy distinct benefits stemming from miniaturization. EdH torques increase linearly with frequency (while magnetic equilibrium is maintained), such that EdH and cross-product torques are comparable in nanoscale torque studies at radio frequencies. The authors also demonstrate EdH torque phase to be a crucial observable, enabling clean separation of EdH and cross-product contributions and heralding the onset of departures from equilibrium.
Topics & Concepts
PhysicsMagnetic momentAngular momentumTorqueObservableMiniaturizationEinsteinCondensed matter physicsClassical mechanicsQuantum mechanicsMaterials scienceNanotechnologyMagnetic properties of thin filmsMechanical and Optical ResonatorsQuantum and electron transport phenomena