Resonant Ultrasonic Spectroscopy: A new access to Skyrmion lattice

POSTER

Abstract

We employed Resonant Ultrasonic Spectroscopy (RUS) measurements as an approach to the Skyrmion crystal (SKX) lattice. The elastic modulus and attenuation of MnSi were systematically investigated. The important findings are: (1) We reported the first complete measurement of the elastic tensor of MnSi with RUS, and studied their behaviors near the SKX phase. The phase diagram is mapped out. (2) In the presence of a DC current, we studied the decoupling of SKX and the crystallographic lattice and got a critical current density jcā‰ˆ61.8 kA/m2. (3) With a field angular dependent RUS measurement, we observed abrupt changes of the elastic modulus and attenuation when the magnetic field is parallel to the [011] crystallographic direction. Calculations based on phenomenological Ginzburg-Landau theory were performed to understand the nature of magneto-crystalline coupling between the SKX lattice and the underlying crystallographic lattice.

Presenters

  • Yongkang Luo

    • Department of Physics and Astronomy, UCLA
    • Physics and Astronomy, Univ of California - Los Angeles
    • Los Alamos Natl Lab
    • Los Alamos National Laboratory

Authors

  • Yongkang Luo

    • Department of Physics and Astronomy, UCLA
    • Physics and Astronomy, Univ of California - Los Angeles
    • Los Alamos Natl Lab
    • Los Alamos National Laboratory

  • Shizeng Lin

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab

  • David Fobes

    • Los Alamos Natl Lab
    • MPA-CMMS, Los Alamos National Lab

  • Nicholas Wakeham

    • Los Alamos Natl Lab

  • Zhiqi Liu

    • Los Alamos Natl Lab

  • Eric Bauer

    • MPA-CMMS, Los Alamos National Laboratory
    • Los Alamos National Laboratory
    • Los Alamos Natl Lab
    • Condensed Matter and Magnetic Science Group, Los Alamos National Laboratory
    • Los Alamos National Lab
    • Condensed Matter and Magnet Science Group, Los Alamos National Laboratory

  • Jonathan Betts

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab
    • NHMFL-PFF, Los Alamos National Laboratory
    • National High Magnetic Field Laboratory

  • Albert Migliori

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab

  • Joe Thompson

    • MPA-CMMS, Los Alamos National Laboratory
    • Los Alamos National Laboratory
    • Condensed Matter and Magnetic Science Group, Los Alamos National Laboratory
    • Los Alamos Natl Lab
    • Condensed Matter and Magnet Science Group, Los Alamos National Laboratory

  • Marc Janoschek

    • Los Alamos National Laboratory
    • Los Alamos Natl Lab
    • MPA-CMMS, Los Alamos National Lab

  • Boris Maiorov

    • Los Alamos National Laboratory
    • Materials Physics and Applications Division, Los Alamos National Laboratory
    • Los Alamos Natl Lab