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.~

*This work is sponsored by the US DOE Basic Energy Sciences.

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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