Yb-Coアモルファス薄膜の磁気的性質

Abstract

Magnetic properties of Yb-Co amorphous alloy films prepared by rf magnetron sputtering are studied. Compositional and temperature dependencies of saturation magnetization are measured. Based on the mean field analysis of these data, it is strongly suggested that Yb becomes 2+ ions instead of 3+ in the alloy and loose their magnetic moment. The decrease of Co atomic moment by the addition of Yb is well coincide with the theory based on the virtual bound model. The perpendicular magnetic anisotropy as measured is found to be mainly from the shape anisotropy and the intrinsic perpendicular anisotropy could not be separated.