Title :
Rapidly annealed hexagonal ferrite thin films for recording medium
Author :
Morisako, A. ; Kubono, T. ; Matsumoto, M. ; Naoe, M.
Author_Institution :
Fac. of Eng., Shinshu Univ., Nagano, Japan
fDate :
9/1/2000 12:00:00 AM
Abstract :
Bi added Ba-ferrite thin films were prepared at room temperature with different Bi composition, and successively annealed in a vacuum to crystallize. The addition of Bi is effective in reducing the grain size. The Ms, Hc and grain size for Bi-BaM films were about 150 emu/cm3, 4 kOe and 40 nm, respectively, after annealing at 750 C for 30 seconds. A recording density D50 of 130 kfrpi was obtained with Bi-BaM thin film disk with the film thickness of 100 nm
Keywords :
barium compounds; bismuth; crystallisation; ferrites; grain size; magnetic disc storage; magnetic recording; magnetic thin films; rapid thermal annealing; 30 sec; 750 C; Bi added Ba-ferrite thin films; Bi-BaOFe2O3; crystallization; grain size reduction; rapidly annealed hexagonal ferrite thin films; recording density; recording medium; room temperature; thin film disk; Annealing; Bismuth; Crystallization; Disk recording; Ferrite films; Grain size; Iron; Magnetic films; Temperature; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
