Magnetic Properties of FePt Material Influenced by Heat-Assisted Using Micromagnetic Simulation

Platinum (FePt) is a ferromagnetic material that has a Face Centered Cubic (FCC) crystal structure. FePt material is classified as a hard magnetic material that can be applied as a magnetic storage medium. The composition of the material used in this study was Fe0.85Pt0.15. This study examined the magnetic properties of nano-sphere shaped FePt materials against the coercivity fields under the effect of heat-assisted variations in laser power values. The difference in magnetic properties due to the influence of laser power was seen based on the hysteresis curve. Micro-magnetic simulations were carried out to obtain Curie-temperature values, hysteresis curves, and configuration of the direction of spin of FePt material. This simulation found the Curie-temperature of the material as 650 K. The direction of the magnetization reversed by the power laser-assisted so quickly. With a small coercivity field; magnetic recording media can carry out the writing and recording process in high capacity. Based on the simulation results, laser power that has the potential to be applied to Fe_0.85Pt_0.15 material. When the computer works at temperatures 0 K, the laser power 0 W to 0.0026 W can be applied. We use the suitable laser power 0 W to 0.016 W at temperatures of 298 K and 318. While the temperature of 339 K cannot be applied with laser power because it gets an overheat temperature.