Title :
High coercivity of barium ferrite (BaM) films deposited by arc discharge evaporation
Author :
Matsushita, Nobuhiro ; Naoe, Masahiko
Author_Institution :
Dept. of Phys. Electron., Tokyo Inst. of Technol., Japan
fDate :
11/1/1993 12:00:00 AM
Abstract :
In this study, magnetoplumbite barium ferrite (BaM) films were prepared by arc-discharge evaporation and subsequent annealing in air. The films deposited at a substrate temperature Ts of 150°C and then annealed at TA of 800°C in air have exhibited a saturation magnetization Ms of 380 emu/cc and a coercivity Hc of 2.2 kOe, almost the same as those of BaM films deposited at Ts of 500°C. Therefore, the preparation process of depositing BaM films at Ts of 150°C by arc evaporation and subsequently annealing them at TA of 800°C may be applicable for mass production of rigid magnetic disks with high density
Keywords :
barium compounds; coercive force; ferrites; hard discs; magnetic recording; magnetic thin films; plasma deposition; 150 C; 500 C; 800 C; Ba ferrite; BaFe12O19; annealing; arc-discharge evaporation; high coercivity film; high density disc; magnetoplumbite films; rigid magnetic disks; saturation magnetization; substrate temperature; Arc discharges; Barium; Coercive force; Ferrite films; Magnesium compounds; Magnetic anisotropy; Magnetic films; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization;
Journal_Title :
Magnetics, IEEE Transactions on
