Structure and magnetic properties of vacuum annealed FePt/Ag nano-multilayers
YANG Tao, YU Guanghua, HWANG Pol & ZHU Fengwu Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083, China
FePt/Ag)n nano-multilayers were deposited on MgO(100) single crystal with laser ablation and then sub-jected to annealing. FePt L10 grains with (001) texture and a large perpendicular magnetic anisotropy constant Ku of the order of 106 J/m3 were formed. A thick Ag layer is found to be favorable for improving the (111) preferential orientation and decreasing the dispersion of the easy axis for magnetiza-tion. The measurement of time decay of magnetization gave rise to an activation volume as small as 6×10-25 m3, showing the promising perspective of being the recording medium for future high density perpendicular recording.
【CateGory Index】： O484.43