Simulation of Magnetic Recording Characteristics Using an Amorphous Perpendicular Recording Medium

摘要

Continuous media such as amorphous media are very promising for use in ultra-high density magnetic recording because of their high anisotropy and thermal stability. Experimental studies have now begun on the magnetic recording characteristics of a TbFeCo amorphous medium. We examined the magnetic recording characteristics of this continuous medium by simulation using the Landau-Lifshitz-Gilbert equation. By simulating recorded magnetization patterns with various exchange stiffnesses, we found that the number of small reversed domains decreased and the magnetic transition became sharper with increasing exchange stiffness. Moreover, a clear magnetization pattern at an areal density of 380 Gbit/inch~2 was obtained in a simulation using real amorphous medium parameters.