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Room-temperature magnetoresistance of one-dimensional magnetite (Fe3O4) nanostructures

Published online by Cambridge University Press:  01 February 2011

Zuqin Liu ,
Daihua Zhang  and
Chongwu Zhou
Zuqin Liu
Affiliation:
Department of Electrical Engineering - Electrophysics University of Southern California Los Angeles, California 90089, U. S. A
Daihua Zhang
Affiliation:
Department of Electrical Engineering - Electrophysics University of Southern California Los Angeles, California 90089, U. S. A
Chongwu Zhou
Affiliation:
Department of Electrical Engineering - Electrophysics University of Southern California Los Angeles, California 90089, U. S. A
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Abstract

In this paper, we present our recent studies on the synthesis and magnetoresistance of single crystalline Fe3O4 core-shell nanowires and nanotubes. Homogeneous Fe3O4 nanowires/tubes with controllable length, diameter and wall thickness were synthesized. The as-prepared material composition and stoichoimetry have been carefully examined and confirmed with a variety of characterization techniques including XRD, EDS, XPS, and TEM. Magnetoresistance under different temperatures was systemically studied. Up to 1.2% room temperature magnetoresistance was observed in the as synthesized nanowires/tubes under a magnetic field of B = 1.8 T.

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