Ferromagnetic Resonance

Ferromagnetic resonance (FMR) is a phenomenon where magnetic materials, like iron or nickel, absorb energy from an oscillating magnetic field at specific frequencies. When these materials are exposed to a static magnetic field, their tiny magnetic moments (spins) align in a particular direction. If an alternating magnetic field matches the natural precession frequency of these spins, the material absorbs energy efficiently, causing the spins to oscillate more vigorously. This resonance condition helps scientists study the magnetic properties of materials, such as magnetic anisotropy and damping, and is useful in developing advanced electronic and magnetic devices.