Title :
Magnetization process and thermal stability in longitudinal magnetic recording media with a stabilizing layer
Author :
Sbiaa, Rachid ; Ahmad, Ehsan ; Suzuki, Takao ; Abarra, E. Noel
Author_Institution :
Inf. Storage Mater. Lab., Toyota Technol. Inst., Nagoya, Japan
fDate :
7/1/2001 12:00:00 AM
Abstract :
The thermal stability in an exchange coupled CoPtCrB trilayer structure medium (TL) is discussed and compared to that for the corresponding single layer (SL) medium. The time dependence of magnetization shows a nonlinear behavior. The magnetization decay rate is found to be reduced in TL when the applied field is close to the coercivity. The DC demagnetization (DCD) reversal mechanisms are investigated by magnetic force microscopy. It is observed that for the reversed field close to remanent coercivity of the TL and SL, very coarse magnetic structures appear
Keywords :
boron alloys; chromium alloys; cobalt alloys; coercive force; demagnetisation; exchange interactions (electron); ferromagnetic materials; interface magnetism; magnetic force microscopy; magnetic recording; magnetic structure; magnetisation; magnetisation reversal; platinum alloys; thermal stability; CoPtCrB; DC demagnetization reversal mechanisms; coarse magnetic structures; coercivity; exchange coupled CoPtCrB trilayer structure medium; longitudinal magnetic recording media; magnetic force microscopy; magnetization decay rate; magnetization process; nonlinear behavior; remanent coercivity; reversed field; single layer; stabilizing layer; thermal stability; time dependence; Coercive force; Demagnetization; Magnetic field measurement; Magnetic films; Magnetic force microscopy; Magnetic recording; Magnetization; Remanence; Thermal stability; Viscosity;
Journal_Title :
Magnetics, IEEE Transactions on
