Magnetic Properties and Microstructure of FePt(BN, Ag, C) Films

Abstract

The microstructure and magnetic properties of FePt(BN, Ag, C) granular films grown on the MgTiON intermediate layer with and without the MoC inserting layer were studied. Without the MoC inserting layer, the 6 nm thick FePt film is continuous, which favors the domain wall motion magnetization reversal process and shows a lower out-of-plane coercivity (Hc) value of 6.7 kOe. The FePt(BN, Ag, C) granular film was grown in ball- and square-like grains with an almost vertical contact angle, and the out-of-plane coercivity (Hc) was increased to 15.5 kOe. When the MoC with a thickness of 3 nm was capped on the MgTiON intermediate layer, the FePt grains with and without (BN, Ag, C) segregants were both formed in large trapezoidal islands with a low contact angle morphology. The out-of-plane Hc value changed from 14.9 to 13.2 kOe and the reduced coercivity was due to larger grain sizes and a lower ordering degree of the FePt(BN, Ag, C) film.

Micromagnetic Simulation of L10-FePt-Based Transition Jitter of Heat-Assisted Magnetic Recording at Ultrahigh Areal Density

“…Magnetic materials are modified to accommodate increasing the areal density for the magnetic recording technology. The L 1 0 -FePt medium is currently selected as a candidate because of the suitability of the magnetic properties [ 4 , 5 , 6 , 7 , 8 ]. The high K u , the high saturation magnetization, M s , and the low curie temperature, T c , are the magnetic properties of L 1 0 -FePt that have been optimized for the new technology of hard disks, such as MAMR [ 9 ] and HAMR [ 4 , 10 , 11 , 12 , 13 , 14 , 15 ].…”