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Interparticle interactions and time effects in very thin Fe–SiO2 granular films

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4 Author(s)
Otte, D. ; Center for Materials for Information Technology, The University of Alabama, Tuscaloosa, Alabama 35487-0209 ; Weston, J.L. ; Zhou, J.N. ; Barnard, J.A.

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Time decay and remanence measurements have been made on a series of very thin Fe–SiO2 granular thin films of varying composition. The susceptibility and the magnetic viscosity decreases drastically when the film thickness is thin enough to reach a two-dimensional arrangement of the granules. The measured values of the magnetic viscosity are very low (2% loss per decade) in the thinnest films so that further investigations in granular magnetic systems with higher anisotropy promise greater advantages for recording media. © 1999 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:85 ,  Issue: 11 )