Skyrmions and spirals in MnSi under hydrostatic pressure
Lars J. Bannenberg, Ravil Sadykov, Robbert M. Dalgliesh, Chris Goodway, Deborah L. Schlagel, Thomas A. Lograsso, Peter Falus, Eddy Lelièvre-Berna, Andrey O. Leo… 展开作者
Lars J. Bannenberg, Ravil Sadykov, Robbert M. Dalgliesh, Chris Goodway, Deborah L. Schlagel, Thomas A. Lograsso, Peter Falus, Eddy Lelièvre-Berna, Andrey O. Leonov, Catherine Pappas
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 $\langle 111 \rangle$ to $\langle100\rangle$ 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.
Comparison of skyrmion phases between poly and single-crystal MnSi by composite magnetoelectric method
Hebei Normal University（河北师范大学）；Chongqing University（重庆大学）；Chinese Academy of Science（中国科学院）；Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）
Detailed dynamics of a moving magnetic skyrmion lattice in MnSi observed using a small-angle neutron scattering under an alternating electric current flow
