Title :
Relaxation time and thermal stability in magneto-optical recording media
Author :
Sbiaa, Rachid ; Mochida, Mitsunori ; Itoh, Yusuke ; Suzuki, Takao
Author_Institution :
Toyota Technol. Inst., Nagoya, Japan
fDate :
9/1/2000 12:00:00 AM
Abstract :
The time dependence of the magnetization process in amorphous TbFeCo thin films and (TbFeCo/Pt) multilayers is studied. By assuming a Gaussian distribution of relaxation times for magnetic aftereffect, the non-Arrhenius behavior of the magnetization decay is found in almost all samples. From a fitting of experimental data one can determine the mean value of relaxation time τ0 and also its width Δτ0. The multilayers of TbFeCo/Pt show a high stability compared to single layers of TbFeCo with also a small activation volume
Keywords :
Gaussian distribution; amorphous magnetic materials; cobalt alloys; iron alloys; magnetic aftereffect; magnetic multilayers; magnetic thin films; magnetisation reversal; magneto-optical recording; remanence; sputtered coatings; terbium alloys; thermal stability; Gaussian distribution; TbFeCo; TbFeCo-Pt; amorphous thin films; isothermal remanence; magnetic aftereffect; magnetic viscosity; magnetization decay; magnetization process; magnetization reversal; magneto-optical recording media; multilayers; non-Arrhenius behavior; relaxation time; small activation volume; sputtered films; thermal stability; time dependence; Amorphous magnetic materials; Magnetic anisotropy; Magnetic field measurement; Magnetic multilayers; Magnetic recording; Magnetization; Magnetooptic recording; Perpendicular magnetic anisotropy; Thermal stability; Viscosity;
Journal_Title :
Magnetics, IEEE Transactions on
