Magnetic and magneto-optical properties for (Co_<100-x>Fe_x)_<50>Pt_<50> alloy thin films

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A study of magnetic and magneto-optical properties of (Co_<100-x>Fe_x)_<50>Pt_<50> (0≦x≦100) alloy thin films in conjunction with the structure is carried out.The intrinsic perpendicular magnetic anisotropy constant K_u measured at room temperature increases with order parameter, and decreases with tetragonality c/a.This result is at variance with the calculation based on the first principle analysis at the order parameter S=1.The K_u increases with S for all the compositions.The polar Kerr rotation of (Co_<100-x>Fe_x)_<50>Pt_<50> thin films is enhanced for photon energies over 1.5-3.5eV and 4-6.8eV with increasing Fe content.On the other hand, the polar Kerr ellipticity exhibits a rather complicated change with Fe content.
社団法人日本磁気学会の論文
2001-03-15