Ferromagnetic resonance

Ferromagnetic resonance (FMR) is a technique used to study the magnetic properties of ferromagnetic materials. It involves the interaction of microwave-frequency electromagnetic radiation with the magnetic moments of a ferromagnet, typically at resonant frequencies that depend on the material's magnetic properties. When a magnetic field is applied to a ferromagnet, the magnetic moments (spins) of electrons within the material tend to align with the field.