Engineering the Dzyaloshinskii-Moriya interaction in MnxFe1-xGe thin films

ORAL

Abstract

Controlling chiral interactions in B20-hellimagnet systems is an exciting route to tailoring topological spin textures, e.g. Bloch skyrmions, in these systems. Forming MnxFe1-xGe alloys enable this control by varying x, which was previously studied using Lorentz transmission electron microscopy and neutron scattering studies on bulk MnxFe1-xGe crystals [1,2]. Thin film versions of this material enable spintronic devices that take advantage of non-collinear spin textures, however, the growth of MnxFe1-xGe compounds has been an outstanding challenge. Here we report the successful MBE growth and comprehensive characterization of epitaxial MnxFe1-xGe films. In addition, in concert with micromagnetic simulations, we use microwave absorption spectroscopy to quantify the Dzyaloshinskii-Moriya interaction. Our approach also tests the limits of micromagnetic computational treatment of a helimagnets in which the helical pitch is comparable to a lattice constant.
[1] K. Shibata et al., Nat. Nanotechnol. 8, 723 (2013).
[2] S. V. Grigoriev et al., Phys. Rev. Lett. 110, 207201 (2013).

–

Presenters

  • Emrah Turgut

    Cornell Univ, Applied Engineering Physics, Cornell University

Authors

  • Emrah Turgut

    Cornell Univ, Applied Engineering Physics, Cornell University

  • Hanjong Paik

    Cornell Univ

  • Kayla Nguyen

    Applied Engineering Physics, Cornell University, Cornell Univ

  • David Muller

    Cornell University, School of Applied and Engineering Physics, Cornell University, Applied Engineering Physics, Cornell University, Cornell Univ

  • Darrell Schlom

    Materials Science, Cornell University, Department of Materials Science and Engineering, Cornell University, Department of Material Science and Engineering, Cornell University, Cornell University, Cornell Univ, Materials Science and Engineering, Cornell University

  • Gregory Fuchs

    Applied and Engineering Physics, Cornell University, Cornell Univ, School of Applied and Engineering Physics, Cornell University, Applied Engineering Physics, Cornell University, Cornell University