The study of the number of free electron bandfilling effect at different flying-height in TEAMR

Abstract

Trapping electron-assisted magnetic recording (TEAMR) is one writing method of hard disk drive (HDD) that reduces the anisotropy energy of magnetic recording layer before writing process. This paper studied the number of free electrons bandfilling at different the flying-height (FH), the relative permittivity of over coat,and electric potential at writer pole by using 3D models simulator. The results indicate that the number of free electrons bandfilling in with 2 nm of flying-height is lower 38 times than without flying-height condition. The relative permittivity of over coat increment is not sufficient to reduce anisotropy energy of L10 ordered FePt. In the last study, the results show that the number of free electrons bandfilling increases slightly while the electric potential at the writer pole increases. In with flying-height case of TEAMR, the number of free electrons per unit cell is very low that cannot affect to reduce media coercivity of L10 ordered FePt. © 2019 IEEE.