标题： 在体手性磁体表面观察到扭曲的倾斜圆锥相的共振弹性X射线散射 显示英文标题

标题： Observation of distorted tilted conical phase at the surface of a bulk chiral magnet with resonant elastic x-ray scattering

摘要： 我们报告了在磁绝缘体Cu$_2$OSeO$_3$表面在低温下沿<100>方向施加磁场时，通过共振弹性X射线散射(REXS)观察到的各种磁性构型，包括螺旋和斯格明子。 我们在宽广的磁场范围内观察到一种被称为畸变倾斜圆锥螺旋(TC)相的有序表面态。 畸变的TC相在REXS倒易空间图中表现出特征性的高次谐波磁性卫星。 斯格明子在静态磁场循环后出现，并似乎与畸变的TC相共存。 我们的结果表明，这种相代表了一种独特且稳定的表面态，在磁场循环下不会消失，并持续到磁场强度增加到足以形成场极化态为止。 显示英文摘要

摘要： We report on various magnetic configurations including spirals and skyrmions at the surface of the magnetic insulator Cu$_2$OSeO$_3$ at low temperatures with a magnetic field applied along <100> using resonant elastic X-ray scattering (REXS). We observe a well-ordered surface state referred to as a distorted tilted conical spiral (TC) phase over a wide range of magnetic fields. The distorted TC phase shows characteristic higher harmonic magnetic satellites in the REXS reciprocal space maps. Skyrmions emerge following static magnetic field cycling and appear to coexist with the distorted TC phase. Our results indicate that this phase represents a distinct and stable surface state that does not disappear with field cycling and persists until the field strength is increased sufficiently to create the field-polarized state.