Investigation of the temperature-dependence of ferromagnetic resonance and spin waves in Co2FeAl0.5Si0.5

TL;DR

This study investigates how ferromagnetic resonance and spin wave properties in Co2FeAl0.5Si0.5 vary with temperature, revealing decreasing damping with rising temperature and high spin wave velocities and attenuation lengths at room temperature.

Contribution

It provides new insights into the temperature dependence of ferromagnetic resonance and spin wave characteristics in CFAS, a promising material for spintronics.

Findings

Damping constant decreases as temperature increases from 13 to 300 K.

Spin wave group velocities reach up to 26 km/s at room temperature.

Attenuation lengths of spin waves are as high as 23.3 micrometers.

Abstract

Co2FeAl0.5Si0.5 (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 26 km/s and 23.3 um, respectively, at room temperature.