Temperature dependent intrinsic Gilbert damping in magnetostrictive FeCoSiB thin film

A low Gilbert damping factor is crucial for emerging magneto-acoustic devices. In current work, angle-dependent and temperature-dependent of magnetostrictive FeCoSiB thin films have been investigated using electron spin resonance (ESR) vector network analyzer ferromagnetic (VNA-FMR) techniques, respectively. very ∼0.0038 was measured with in-plane magnetic fields at room temperature. Temperature-dependent VNA-FMR results between 10 K 300 exhibit a conductivity-like feature, which can be attributed to the spin-orbital coupling dominantly controlled by intraband scattering. Our clearly indicate that highly or piezomagnetic film does not necessarily high intrinsic factor.