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

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.