Title :
Tribological properties of barium ferrite films
Author :
Scherge, M. ; Sui, X. ; Ma, X. ; Bauer, C.L. ; Jhon, M.S. ; Kryder, M.H.
Author_Institution :
Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA
fDate :
11/1/1995 12:00:00 AM
Abstract :
Acoustic emission and friction coefficients have been measured during start-stop and continuous sliding for pure and doped barium ferrite films, without lubrication, and compared with concomitant surface topography and magnetic properties. Barium ferrite films averaging about 100 nm in thickness, were produced on thermally oxidized Si substrates by sputter deposition and then furnace or rapid thermal annealed in order to develop optimum microstructure and magnetic characteristics. Four varieties of (hexagonal) barium ferrite were produced and investigated: pure barium ferrite with longitudinal and perpendicular c-axis orientation, pure barium ferrite with perpendicular orientation with Pt underlayer and doped barium ferrite. Results are compared with data obtained from commercial disks with a carbon overcoat
Keywords :
acoustic emission; annealing; barium compounds; ferrites; magnetic thin films; rapid thermal annealing; sliding friction; sputtered coatings; BaFe12O19; Pt underlayer; acoustic emission; barium ferrite films; continuous sliding; friction; furnace annealing; longitudinal orientation; magnetic properties; microstructure; perpendicular orientation; rapid thermal annealing; sputter deposition; start-stop; surface topography; thermally oxidized Si substrates; tribological properties; Acoustic emission; Acoustic measurements; Barium; Ferrite films; Friction; Furnaces; Lubrication; Magnetic properties; Sputtering; Surface topography;
Journal_Title :
Magnetics, IEEE Transactions on
