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Proceedings Paper

Colossal magnetoresistance in Fe1-xCoxSb2
Author(s): C. Petrovic; K. J. Thomas; Y. Lee; T. Vogt; S. L. Bud'ko; P. C. Canfield
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Paper Abstract

We review magnetic and transport properties of FeSb2 and Fe0.75Co0.25Sb2. Single crystals of pure and Co-substituted FeSb2 have been grown using molten metallic fluxes. Synchrotron powder x-ray diffraction confirms phase purity and orthorhombic Pnnm space group. Cobalt substitution drives system from temperature independent diamagnet to a ferromagnet at T=0 with very small ordered moment. Application of H=70kOe enhances resistivity [ρ(H)-ρ(0)]/ρ (0) more than two orders of magnitude at T=2K. Underlying physics and possible mechanisms for the colossal response of resistivity to magnetic field will be discussed.

Paper Details

Date Published: 30 August 2005
PDF: 9 pages
Proc. SPIE 5932, Strongly Correlated Electron Materials: Physics and Nanoengineering, 59321X (30 August 2005); doi: 10.1117/12.622964
Show Author Affiliations
C. Petrovic, Brookhaven National Lab. (United States)
K. J. Thomas, Brookhaven National Lab. (United States)
Y. Lee, Brookhaven National Lab. (United States)
T. Vogt, Brookhaven National Lab. (United States)
S. L. Bud'ko, Iowa State Univ. (United States)
P. C. Canfield, Iowa State Univ. (United States)

Published in SPIE Proceedings Vol. 5932:
Strongly Correlated Electron Materials: Physics and Nanoengineering
Ivan Bozovic; Davor Pavuna, Editor(s)

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