Title :
Recording characteristics and thermal stability of AFC thin film media
Author :
Guan, Lijie ; Zhu, Jian-Gang
Author_Institution :
Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA
fDate :
7/1/2001 12:00:00 AM
Abstract :
We present a micromagnetic and analytical analysis of double layer media with antiferromagnetic exchange coupling. It has been found that in order to achieve good recording performance, strong interlayer exchange coupling and large thickness ratio are desired. When the thickness of the bottom layer is small, thermal activation assists the bottom layer to switch, which requires a smaller interlayer exchange coupling constant. Thermal stability of double layer AFC media has also been investigated in comparison to single layer media in the case of strong and weak interlayer exchange coupling
Keywords :
coercive force; exchange interactions (electron); magnetic hysteresis; magnetic multilayers; magnetic recording; magnetic switching; thermal stability; antiferromagnetic exchange coupling; bottom layer switching; coercivity; double layer media; hysteresis curves; large thickness ratio; magnetostatic interactions; micromagnetic analysis; multilayer media; recording characteristics; strong interlayer exchange coupling; thermal activation; thermal stability; thin film media; Antiferromagnetic materials; Automatic frequency control; Couplings; Crystallization; Magnetic separation; Magnetostatics; Micromagnetics; Saturation magnetization; Thermal stability; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
