Investigation of the temperature-dependence of ferromagnetic resonance and spin waves in Co_2FeAl_(0.5)Si_(0.5)

摘要

Co_2FeAl_(0.5)Si_(0.5) (CFAS) is a Heusler compound that is of interest for spintronics applications, due to its high spin polarization and relatively low Gilbert damping constant. In this study, the behavior of ferromagnetic resonance as a function of temperature was investigated in CFAS, yielding a decreasing trend of damping constant as the temperature was increased from 13 to 300 K. Furthermore, we studied spin waves in CFAS using both frequency domain and time domain techniques, obtaining group velocities and attenuation lengths as high as 26km/s and 23.3 μm, respectively, at room temperature.