Colossal magnetoresistance in Fe1-xCoxSb2

C. Petrovic; K. J. Thomas; Y. Lee; T. Vogt; S. L. Bud'ko; P. C. Canfield

doi:10.1117/12.622964

30 August 2005 Colossal magnetoresistance in Fe_1-xCo_xSb₂

C. Petrovic, K. J. Thomas, Y. Lee, T. Vogt, S. L. Bud'ko, P. C. Canfield

Proceedings Volume 5932, Strongly Correlated Electron Materials: Physics and Nanoengineering; 59321X (2005) https://doi.org/10.1117/12.622964
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

We review magnetic and transport properties of FeSb₂ and Fe_0.75Co_0.25Sb₂. 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.

Citation Download Citation

C. Petrovic, K. J. Thomas, Y. Lee, T. Vogt, S. L. Bud'ko, and P. C. Canfield "Colossal magnetoresistance in Fe_1-xCo_xSb₂", Proc. SPIE 5932, Strongly Correlated Electron Materials: Physics and Nanoengineering, 59321X (30 August 2005); https://doi.org/10.1117/12.622964

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