Physik-Department, Technische Universität München, James-Franck-Str., D-85748 Garching, Germany.
Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstr. 1, D-85748 Garching, Germany.
Phys Rev Lett. 2015 Dec 31;115(26):267202. doi: 10.1103/PhysRevLett.115.267202. Epub 2015 Dec 28.
We report comprehensive small angle neutron scattering measurements complemented by ac susceptibility data of the helical order, conical phase, and Skyrmion lattice phase (SLP) in MnSi under uniaxial pressures. For all crystallographic orientations uniaxial pressure favors the phase for which a spatial modulation of the magnetization is closest to the pressure axis. Uniaxial pressures as low as 1 kbar applied perpendicular to the magnetic field axis enhance the Skyrmion lattice phase substantially, whereas the Skyrmion lattice phase is suppressed for pressure parallel to the field. Taken together we present quantitative microscopic information on how strain couples to magnetic order in the chiral magnet MnSi.
我们报告了全面的小角度中子散射测量结果，并结合 MnSi 中螺旋有序、锥形相和斯格明子晶格相 (SLP) 的交流磁化率数据。对于所有晶体取向，单轴压力有利于磁化空间调制最接近压力轴的相。垂直于磁场轴施加的低至 1 kbar 的单轴压力会大大增强斯格明子晶格相，而平行于磁场的压力则会抑制斯格明子晶格相。综上所述，我们提供了关于应变如何与手性磁体 MnSi 中的磁有序耦合的定量微观信息。
