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Fabrication and magnetic properties of granular alloys

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2 Author(s)
Gavrin, A. ; Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218 ; Chien, C.L.

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Granular alloys of iron with other transition metals have been fabricated in both Al2O3 and SiO2 matrices. Both stable (Fe‐Ni, Fe‐Co) and metastable (Fe‐Cu) alloys have been achieved. Under appropriate deposition conditions, the grains are single‐phase alloys ranging in size from 15 to 50 Å. Superparamagnetism and enhanced coercivity have been observed, and the effect of grain size on these phenomena has been investigated. We have also studied the effects of the different insulating matrices.

Published in:

Journal of Applied Physics  (Volume:67 ,  Issue: 2 )