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Granular Magnetism

Published online by Cambridge University Press:  28 February 2011

C.L. Chien
C.L. Chien*
Affiliation:
Department of Physics & Astronomy, The Johns Hopkins University, Baltimore Maryland 21218
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Abstract

Recent studies of granular magnetic solids involving Fe and its alloys embedded in either an insulating medium (e.g. SiO2 A12O3) or a metallic medium are described. Below the percolation threshold, isolated magnetic granular exhibit single-domain properties and superparamagnetic relaxation. Giant coercivity has been uncovered in granular Fe-SiO2, with Hc- as high as 3 kOe at 5 K and 1.1 kOe at 300 K. Some recent results on granular Fe in a metallic medium, and other granular magnetic systems will also be discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 195: Symposium S – Physical Phenomena in Granular Materials , 1990 , 411
Copyright
Copyright © Materials Research Society 1990

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References

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