Frequency-selective Control of Ferromagnetic Resonance Linewidth in Magnetic Multiplayers

Abstract

We report on a frequency-specific linewidth broadening of the ferromagnetic resonance (FMR) mode of a NiFe free layer within a magnetic multilayer stack. The FMR studies reveal a significant broadening of the FMR linewidth of the free layer at frequencies where this resonance is degenerate with FMR modes stemming from other layers within the multilayer stack. By pinning part of the magnetic multilayer to an antiferromagnet, we tailor a ferromagnetic linewidth behavior that is anisotropic for a specific frequency.

Description
Keywords
Linewidths, Multilayers, Magnetization dynamics, Exchange interactions, Ferromagnetic resonance, Acoustic resonance, Magnetic anisotropy, Antiferromagnetism, Magnetic fields, Magnetic field measurements
Citation
Schafer, S.,et al. (2012): Frequency-selective Control of Ferromagnetic Resonance Linewidth in Magnetic Multiplayers, Applied Physics Letters, 110.