Magnetic and transport properties of Fe1-xCoxSb2

ORAL

Abstract

Single crystals of Fe1-xCoxSb2 have been grown by molten metallic flux technique. Synchrotron powder x-ray diffraction confirms phase purity and orthorhombic Pnnm space group. Cobalt substitution drives system from diamagnetic semiconductor to metallic ferromagnet at T=0 with very small ordered moment. Application of magnetic field leads to large magnetoresistance [R(H)-R(0)]/ R (0) = 185 at T=2K. The results are discussed in connection with possible Kondo Insulator description of FeSb2.

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Authors

  • Cedomir Petrovic

    Dept. Physics, Brookhaven National Laboratory, Brookhaven National Laboratory, BNL, Physics Department, Brookhaven National Laboratory

  • Yongjae Lee

    Physics Department and Center for Functional Nanomaterials, Brookhaven National Laboratory

  • Thomas Vogt

    Physics Department and Center for Functional Nanomaterials, Brookhaven National Laboratory