Near room temperature helical magnetism in Fe(1-x)Cr(x)Ge

ORAL

Abstract

Helical magnetic structures in chiral metallic magnets have attracted much interest recently because of the observation of complex spin textures, for example the skyrmion lattice.~ FeGe is a known B20 spiral ferromagnet that orders at the relatively high temperature of 280K with a helical modulation period of 700 angstroms, which propagates along either the [100] or [111] directions depending on temperature. ~Here we report a study on the evolution of helimagnetism as a function of Cr doping on a series of Fe(1-x)Cr(x)Ge samples with x $=$ 0.03 to 1. Magnetic susceptibility measurements have shown that the ferromagnetic-like transition associated with helimagnetism in FeGe is suppressed around x $=$ 0.4.~

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Authors

  • Yuen Yiu

    The University of Tennessee, Department of Physics and Astronomy, University of Tennessee

  • Nirmal Ghimire

    Oak Ridge National Laboratory, The University of Tennessee/Oak Ridge National Laboratory, Department of Physics and Astronomy, University of Tennessee

  • Michael McGuire

    Oak Ridge National Laboratory, ORNL, Materials Science and Technology Division, Oak Ridge National Laboratory

  • Ashfia Huq

    Chemical and Engineering Materials Division, Neutron Sciences Directorate, Oak Ridge National Laboratory

  • David Mandrus

    University of Tennessee, Dept. Materials Science and Engineering, The University of Tennessee and Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge National Laboratory, The University of Tennessee/Oak Ridge National Laboratory, Materials Science and Engineering, University of Tennessee

  • Stephen Nagler

    Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge National Laboratory/The University of Tennessee