Experimental and Modeling Study of Thickness Dependence of Amorphous TbFeCo Compensation
ORAL
Abstract
Amorphous TbFeCo thin films with strong perpendicular magnetic anisotropy are found to exhibit significant thickness-dependent ferrimagnetic compensation. The compensation temperature varies over 100 K for film thickness ranging from 15 to 100 nm. Amorphous structure with depth-dependent short-range order has been proposed to explain this thickness-dependence. A micromagnetic model has been built based on an ab-initio atomistic calculation by molecular dynamics of TbFe metallic glass. Micromagnetic simulation with Landau-Lifshitz-Bloch equation agrees quantitatively with the experimental results. Our study provides a way of tuning ferrimagnetic compensation through thickness control, which is useful for application of amorphous TbFeCo thin film in ultrafast spintronics.
–