Title :
Thermal stability of narrow track bits in a 5 Gbit/in2 medium
Author :
Abarra, E.N. ; Suzuki, T.
Author_Institution :
Lab. of Inf. Storage Mater., Toyota Technol. Inst., Nagoya, Japan
fDate :
9/1/1997 12:00:00 AM
Abstract :
The thermal stability of high density written bits in a 5 Gbit/in 2 CoCrPtTa/CrMo medium is examined using a magnetic force microscope. Images of the same 0.8 μm-track all-ones pattern were taken before and after various anneal schedules. Written bits, which for the measured magneto-crystalline anisotropy and switching volume, are predicted by simulation studies to be thermally unstable reveal no significant degradation with annealing up to 490 K for 2 hours. This discrepancy emphasizes the need for more realistic theoretical models
Keywords :
annealing; chromium alloys; cobalt alloys; ferromagnetic materials; grain size; magnetic anisotropy; magnetic force microscopy; magnetic recording; molybdenum alloys; platinum alloys; tantalum alloys; thermal stability; 0.8 micron; 2 h; 490 K; CoCrPtTa-CrMo; all-ones pattern; anneal schedules; grain size; high density written bits; magnetic force microscope; magnetic recording media; magneto-crystalline anisotropy; narrow track bits; switching volume; thermal stability; Anisotropic magnetoresistance; Annealing; Magnetic anisotropy; Magnetic force microscopy; Magnetic forces; Magnetic switching; Perpendicular magnetic anisotropy; Thermal force; Thermal stability; Volume measurement;
Journal_Title :
Magnetics, IEEE Transactions on
