Title :
Thermal stability of written bits in high density magneto-optical recording media
Author :
Mochida, Mitsunori ; Birukawa, Masahiro ; Suzuki, Takao
Author_Institution :
Toyota Technol. Inst., Nagoya, Japan
fDate :
7/1/2001 12:00:00 AM
Abstract :
Masurements of magnetic domains in TbFeCo films currently used as magneto-optical recording media indicate a shrinkage in domain size under accelerated conditions. A criterion factor (Ea/kT) for thermal stability is found to be about 40 for domains with a diameter of about 0.8 μm, where Ea is an activation energy estimated on the basis of Arrenhius plot of the shrinkage with time. For high density recording applications, a higher wall pinning field is necessary
Keywords :
cobalt alloys; iron alloys; magnetic domain walls; magnetic thin films; magneto-optical recording; terbium alloys; thermal stability; Arrenhius plot; TbFeCo; TbFeCo film; activation energy; high-density magneto-optical recording; magnetic domain size; mark length; thermal stability; wall pinning field; written bits; Acceleration; Amorphous magnetic materials; Length measurement; Magnetic domain walls; Magnetooptic recording; Optical recording; Perpendicular magnetic recording; Pulse measurements; Space vector pulse width modulation; Thermal stability;
Journal_Title :
Magnetics, IEEE Transactions on
