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Magnetic Properties of Nanoscale Iron Particles Photodeposited in Glass

Published online by Cambridge University Press:  15 February 2011

D. Sunil ,
H. D. Gafney ,
C. Tsang ,
M. H. Rafailovich ,
J. Sokolov ,
R. J. Gambino  and
D. M. Huang
D. Sunil
Affiliation:
Dept of Chemistry, Queens College of CUNY Flushing, NY 11367.
H. D. Gafney
Affiliation:
Dept of Chemistry, Queens College of CUNY Flushing, NY 11367.
C. Tsang
Affiliation:
Dept of Physics, Queens College of CUNY Flushing N.Y. 11367.
M. H. Rafailovich
Affiliation:
Dept of Materials Sci.& Eng. SUNY at Stony Brook Stony Brook N.Y. 11794.
J. Sokolov
Affiliation:
Dept of Materials Sci.& Eng. SUNY at Stony Brook Stony Brook N.Y. 11794.
R. J. Gambino
Affiliation:
Dept of Materials Sci.& Eng. SUNY at Stony Brook Stony Brook N.Y. 11794.
D. M. Huang
Affiliation:
Bellcore, Red Bank N.J.07701.
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Abstract

Transmission Electron Microscopy(TEM) and magnetization measurements were used to study the correlation between size of the iron particles precipitated in glass and their magnetic properties. The iron particles les s than 40 Å in diameter photodeposited in porous Vycor glass(PVG) show superparamagnetic behavior at room temperature. As the size of the particles increases and reaches about 100 Å in diameter, the magnetization curve shows minor hysteresis with a very large coercivity.

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