Magnetoelastic properties of the epitaxially grown layers of Co2Fe0.4Mn0.6Si and Co2FeGa0.5Ge0.5 Heusler alloys

The half-metallic Co
₂
Fe
_0.4
Mn
_0.6
Si (CFMS) and Co
₂
FeGa
_0.5
Ge
_0.5
(CFGG) Heusler alloys are representative materials showing high spin-polarization of conduction electrons. The main purpose of this work is to shed light on the mechanism of perpendicular anisotropy related to the internal stresses of the film through the magnetoelastic coupling. Magnetoelastic coupling and magnetostriction of these films have not been studied yet. The out-of-plane magnetocrystalline anisotropy and magnetoelastic properties of series of epitaxially grown layers of CFMS and CFGG Heusler alloys have been investigated by means of the strain modulated ferromagnetic resonance (SMFMR), the ferromagnetic resonance technique and by SQUID magnetometer. We study the perpendicular magnetocrystalline anisotropy as well as the magnetoelastic properties of a series of the CFMS and CFGG Heusler alloys of the thicknesses of tens of nanometers.