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Magnetic Properties of Self-Assembled Fe Nanoparticle Arrays

Published online by Cambridge University Press:  21 March 2011

D. Farrell ,
S. Yamamuro  and
S. A. Majetich
D. Farrell
Affiliation:
Dept. of Physics, Carnegie Mellon University Pittsburgh, PA 15213, U.S.A.
S. Yamamuro
Affiliation:
Dept. of Physics, Carnegie Mellon University Pittsburgh, PA 15213, U.S.A.
S. A. Majetich
Affiliation:
Dept. of Physics, Carnegie Mellon University Pittsburgh, PA 15213, U.S.A.
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Abstract

The magnetic properties of multilayer arrays of Fe nanoparticles were compared with those of frozen, dilute suspensions of the same particles. The array sample displayed larger coercivity in both hysteretic and remanent magnetization measurements. However, the derivative of the remanent magnetization curve shows a much broader switching field distribution for the arrays than for the dilute sample. Magnetic relaxation measurements show the convergence of the time dependent properties of the samples at large times, and much more rapid relaxation in the arrays at short times.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 674: Symposia T/U/V – Applications of Ferromagnetic and Optical Materials, Storage and Magnetoelectronics , 2001 , U4.4
Copyright
Copyright © Materials Research Society 2001

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References

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