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Skyrmions and spirals in MnSi under hydrostatic pressure
Ames Laboratory Accepted Manuscripts
  • L. J. Bannenberg, Delft University of Technology
  • R. Sadykov, Russian Academy of Sciences and National University of Science and Technology MISiS
  • R. M. Dalgliesh, Rutherford Appleton Laboratory, STFC
  • C. Goodway, Rutherford Appleton Laboratory, STFC
  • Deborah L. Schlagel, Ames Laboratory
  • Thomas A. Lograsso, Iowa State University and Ames Laboratory
  • P. Falus, Institut Laue-Langevin
  • E. Lelièvre-Berna, Institut Laue-Langevin
  • A. O. Leonov, Hiroshima University
  • C. Pappas, Delft University of Technology
Publication Date
Ames Laboratory; Materials Science and Engineering
Report Number
IS-J 10027
Journal Title
Physical Review B

The archetype cubic chiral magnet MnSi is home to some of the most fascinating states in condensed matter, such as skyrmions and a non-Fermi-liquid behavior in conjunction with a topological Hall effect under hydrostatic pressure. Using small angle neutron scattering, we study the evolution of the helimagnetic, conical, and skyrmionic correlations with increasing hydrostatic pressure. We show that the helical propagation vector smoothly reorients from ⟨111⟩ to ⟨100⟩ at intermediate pressures. At higher pressures, above the critical pressure, the long-range helimagnetic order disappears at zero magnetic field. Nevertheless, skyrmion lattices and conical spirals form under magnetic fields, in a part of the phase diagram where a topological Hall effect and a non-Fermi-liquid behavior have been reported. These unexpected results shed light on the puzzling behavior of MnSi at high pressures and the mechanisms that destabilize the helimagnetic long-range order at the critical pressure.

DOE Contract Number(s)
721.012.102; AC02-07CH11358
Iowa State University Digital Repository, Ames IA (United States)
Citation Information
L. J. Bannenberg, R. Sadykov, R. M. Dalgliesh, C. Goodway, et al.. "Skyrmions and spirals in MnSi under hydrostatic pressure" Vol. 100 Iss. 5 (2019) p. 054447
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