Abstract
A study of structural and magnetic properties of Co0.4 Fe0.6 thin film alloy on Si (1 0 0) substrate deposited using the DC-magnetic sputtering technique is reported. Grazing Incidence X-ray Diffraction (GI-XRD) is used to study the crystal structure of the thin film alloy. The structural analysis reveals that thin-film alloy has a bcc crystal structure with lattice constant 2.656 Å. The thickness of the thin film alloy is about 30 nm measured from X-ray Reflectivity (XRR) data. Energy Dispersive X-ray Analysis (EDAX) confirms the presence of Co and Fe in the thin film alloy with composition 44.4% Co and 55.6% Fe. Magneto-Optic Kerr Effect (MOKE) technique is used to study the magnetic structure of the thin film alloy. Our results suggest that Co0.4Fe0.6 thin film alloy exhibits soft magnetic behavior. The decrease in the coercive field with the increase of rotation of the substrate may relate to the reduction of the grain size according to Hoffman’s ripple theory or change in preferred crystal orientation. Domain wall motion shows that the magnetization reversal occurs via coherent rotation of spins along the hard axis due to the uniaxial nature of the sample. CoFe alloys find many applications, especially in spintronics.
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