Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
61 (1987), S. 3825-3827
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The features of grain growth in Os-added iron oxide films are investigated for the purpose of developing high signal-to-noise ratio (SNR) magnetic recording media. The average grain size of sputter-deposited γ-Fe2O3 films is markedly decreased by Os addition. The grains grow during the reduction process, from α-Fe2O3 to Fe3O4, and maintain the same size in subsequent oxidation, from Fe3O4 to γ-Fe2O3. Moreover, the reduction temperature decreases by 100 °C above 0.88 at. % Os addition. As a result, the grain size of γ-Fe2O3 films decreases from 84 to 35 nm as the Os content increases from 0 to over 0.88 at. %. In addition to the refining effect, an accelerating effect on the reducing reaction brings about an increase in the saturation magnetization and in the squareness ratio of γ-Fe2O3 films. Consequently, an Os-added γ-Fe2O3 thin-film disk has higher output voltage and SNR than other disks.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.338609
Permalink
|
Location |
Call Number |
Expected |
Availability |