Search

This paper reported fabrication of FexPt100-x films with (001) epitaxy on MgO(100) substrates. The atomic percentage of Fe was changed within the range of x=10-85 in order to search the optimal atmic ratio for achieving both high and isotropic-like coercivity. It was found that the Fe60Pt40 filexhibited large coercivities exceeding 5 kOe along both in-plane and out-of-plane directions due to the formation of A1/L10 FePt composite. A penta-domain model for hard/soft/hard exchange spring system was proposed to interpret the anomalous magnetization behaviors observed in Fe60Pt40 sample. By using Fe60Pt40 as the magnetic coating layer on a probe of magnetic force microscope, the flux changes at a linear density of 1000 kfci could be readily observed at a resolution of ~13 nm. [ABSTRACT FROM AUTHOR]