Angular tunable zero-field ferromagnetic resonance frequency in oblique sputtered CoFeBSm thin films

摘要

We investigated the high-frequency magnetic properties of oblique-sputtered CoFeBSm thin films. We found that the zero-field ferromagnetic resonance frequency f_r can be tuned from 3.8 to 6.4 GHz by rotating the samples within the plane. The angular tunable f_r is tentatively explained with the competition of uniaxial anisotropy (arising from the oblique deposition) the rotatable anisotropy (originating from the rotatable stripe domain). These results may have great implications for tunable microwave magnetic devices.