Perpendicular Magnetic Anisotropies and Kerr Spectra of (Cr_<1-x>V_x)Pt_3 Ordered Alloy Films(Magnetism and Spin Dynamics)

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(Cr_<1-x>V_x)Pt_3 alloy films were obtained by annealing (Cr-V)/Pt multilayer films prepared by rf magnetron sputtering. The structure and magnetic and magneto-optical properties for the alloy films were investigated. The CrPt_3 (x = 0) film exhibited an uniaxial anisotropy of K_u = 2.4 × 10^6 erg/cc and a saturation magnetization of M_s = 235 emu/cc. The saturation magnetization and the uniaxial anisotropy decreased with increasing V substitution x. On the other hand, variations of the Kerr spectral shape with increasing substitution x were observed. The θ_K peak around leV of the CrPt_3 film shifted lower energy side with increasing x, and the (Cr_<0.37>V_<0.63>)Pt_3 alloy film showed a plateau around 2 eV in the Kerr spectrum. The X-ray magnetic circular dichroism taken in the V 2p-3d excitation region indicated that the V has a ferromagnetic moment and align parallel to the Cr moment.
社団法人日本磁気学会の論文
2004-11-01