Magnetic and crystallographic properties of Cr1-xFexGe

ORAL

Abstract

According to previously published bulk measurements, Cr1-xFexGe exhibits a quantum critical point at x=0.75, where it turns from a paramagnet (for x<0.75) into a ferromagnet (for x>0.75). Cr1-xFexGe is a simple cubic B20 (FeSi) crystal. The endpoints of the alloy are binary compounds that have been studied to some degree. FeGe, the better known of the two, is a spiral ferromagnet similar to MnSi. However, less is known for CrGe, which is thought to be a weakly ferromagnetic paramagnet with bulk properties that may be explained by the paramagnon theory. We report new neutron scattering results on Cr1-xFexGe for x=0.6, 0.7, 0.75, 0.8.

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Authors

  • Yuen Yiu

    • University of Tennessee

  • Nirmal Ghimire

    • University of Tennessee

  • David Mandrus

    • University of Tennessee and Oak Ridge National Laboratory
    • University of Tennessee, Knoxville, TN, 37996
    • University of Tennessee

  • Stephen Nagler

    • Oak Ridge National Laboratory

  • Michael McGuire

    • Oak Ridge National Laboratory
    • Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA