**4. Conclusion**

The multi-layer thin film stack Ta (25)/FeGaB (15,25,50 and 75)/Ta (5) deposited using the sputter. These film's surface morphology is found by AFM; the results suggested that good quality of thin films obtained. The static magnetization of the multi-layer thin film stack resulted as the magnetic moment increased for the increased thickness of FeGaB. The coercive field and squareness increased for a large thickness of FeGaB film. The dynamic magnetization of the multi-layer thin film stack informed that the inhomogeneous line width is increased for increasing the thickness of FeGaB; which is decreased for lowering the temperature. The damping factor decreased for lower temperatures. The thickness dependence of damping showed enhancement for increasing thickness of FeGaB and provided the inherent/ surface and interface damping. The spin mixing conductance (geff) was calculated and increased for decreasing the temperature. The spin mixing conductance of Ta/ FeGaB(t)/Ta is comparable with Co/Cu thin films. All results suggest the magnetostriction based thin film stack can be employed for magnonics, spin caloritronics, and spintronics applications.
