By Topic

Switching speed limitations in perpendicular magnetic recording media

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

The purchase and pricing options are temporarily unavailable. Please try again later.
1 Author(s)
Lyberatos, A. ; Seagate Research, 1251 Waterfront Place, Pittsburgh, Pennsylvania 15222

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.1567801 

A method to study switching speed limitations in high-frequency magnetic recording is presented. The characteristic parameter is the minimum irreversible switching time that is evaluated by numerical simulation of the writing of a dibit of two transitions using Landau–Lifshitz dynamics. The dibit is written on a perpendicular polycrystalline thin film medium using a single-pole head with a soft underlayer. We study the physical factors that determine the ultimate data rate and consider the problem of optimization of switching speed by changing the relative head-medium velocity, the magnetocrystalline anisotropy, the rise time of the head field, the head-medium separation, the exchange intergranular coupling, and the dispersion in the direction and magnitude of the local anisotropy. © 2003 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:93 ,  Issue: 10 )