The study of the structural, magnetic and magneto-optical properties of (Pt3Co)1-xNix alloy films

The ratio of non-magnetic to magnetic atoms was adjusted from 3:1 to 1:1 within the (Pt3Co)(1-x)Ni-x system by sticking Ni chips to the Pt3Co target. X-ray diffraction and magnetic results showed that perpendicular magnetic anisotropy was not caused by [111] texture at least in the Ni content range of 0.33-0.50. Furthermore, the effect of the Ni addition to the CoPt3 alloy films on their magnetic and magneto-optical properties were investigated. The result shows that satisfactory Curie temperature T-C, cohercivity H-c and Kerr rotation can be simultaneously obtained by selecting suitable Ni content (x = 0.43) in the (Pt3Co)(1-x)Ni-x system. This work provides an experimental basis for the application of PtCoNi alloy films.