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Journal of Applied Physics / Volume 103 / Issue 7 / PROCEEDINGS OF THE 52ND ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS / Magnetic Semiconductors

J. Appl. Phys. 103, 07D113 (2008); doi:10.1063/1.2830830 (3 pages)

Giant positive magnetoresistance in Fe doped In2O3 and InREO3 (RE = Eu,Nd) composites

G. Peleckis1, X. L. Wang1, S. X. Dou1, P. Munroe2, J. Ding3, and B. Lee3

1Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, New South Wales 2522, Australia
2School of Materials Science and Engineering, University of New South Wales, New South Wales 2052, Australia
3Human Protection and Performance Division, Platforms Sciences Laboratory, DSTO, 506 Lorimer Street, Fishermans Bend, Victoria 3207, Australia

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(Received 11 September 2007; accepted 12 October 2007; published online 6 February 2008)

Synthesis and characterization of Fe and rare earth (RE) (RE = Eu,Nd) codoped bulk In2O3 oxide are reported. Composites consisting of Fe-doped In2O3 and InREO3 phases were formed, as determined by x-ray diffraction and transmission electron microscopy, with particle sizes of 50–120 nm. The composites exhibit superparamagnetic and semiconducting behavior. A giant positive magnetoresistance is observed at low temperatures, reaching 81% and 50% at 5 K in Eu–Fe and Nd–Fe codoped samples, respectively.

© 2008 American Institute of Physics

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KEYWORDS and PACS

Keywords

composite materials, giant magnetoresistance, indium compounds, iron, magnetic semiconductors, particle size, superparamagnetism, transmission electron microscopy, X-ray diffraction

PACS

ARTICLE DATA

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http://link.aip.org/link/doi/10.1063/1.2830830

PUBLICATION DATA

ISSN:

0021-8979 (print)  
1089-7550 (online)

Publisher:

$abstract.society.value is a Member of CrossRef American Institute of Physics

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