Development of the New Measurement Techinque for Spin Dynamics of Magnetic Thin Films

we proposed a new measurement technique, which employs a microstripe line probe to detect ferromagnetic resonance (FMR) spectra for a magnetic thin film either with tensile stress or stress free, which enables simultaneous evaluation. Furthermore, the damping constants (α) of these films were evaluated from FMR spectrum with stress free. These measurements were performed at room temperature. These results demonstrate that our proposed measurement technique can determine both α and λ
_s
simultaneously for individual sample with high reliability allowing more precise evaluation of spin dynamics.