MCD Measurement at the Tb M_<4, 5>-edges of Tb_<17>Fe_xCo_<(83-x)> Perpendicular Magnetization Films(Magnetism and Spin Dynamics)

概要

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The electronic and spin states of the perpendicular magnetization films of Tb_<17>Fe_xCo_<(83-x)> (x=0, 9.5, 32.5, 61.4 and 74.5) were measured by means of soft X-ray absorption and magnetic circular dichroism spectroscopy for Tb element to investigate the magnetic anisotropy. The origin of the magnetic anisotropy is said to be caused by a large orbital moment of the well-localized 4f electron. The expectation values of orbital moment <L_Z> for the different composition of Fe were estimated to be about 1.2 μ_B applying a sum rule for the spectra. Using a theoretical model calculation the opening angle of the conical distribution of Tb moment along the easy axis of magnetization was estimated to be about 67 degree.
社団法人日本磁気学会の論文
2004-11-01