ON HIGH MAGNETIC ANISOTROPY ORDERED PHASE Co3Pt ALLOY FILMS WITH HIGH MAGNETO-OPTICAL KERR ACTIVITY

Y. Yamada, W.P. Van Drent, T. Suzuki, E.N. Abarra
1998 Journal of the Magnetics Society of Japan  
Co 75 Pt 25 film~ deposited onto AI 2 0.,(0001), AI 2 0.\( H20) and, MgO(lll) substrates at substrate deposition temperatures from 230 to 450 nc exhibit a large perpendicular magnetic anisotropy ( > 1.0 X 10 7 erg/cm' at room temperature). X·ray diffraction analyses reveal the presence of the hcp C0 3 Pt ordered state in these films. A close correlation b~tween the ordered state and the large perpendicular anisotropy is found for films deposited at 380 "C and above. Magneto·optical spectra show
more » ... a characteristic peak for the film with ordered structure in a photon energy range from 2 to 4 eV in both of Kerr rotation and ellipticity. Magneto-optical properties of Co-Pt alloys above 5 eV are studied for the first time, where high positive Kerr rotation is observed.
doi:10.3379/jmsjmag.22.s2_81 fatcat:oo63q2xprrb5zfksqdf5d2uwza