具有反对称自旋-自旋耦合立方FeGe的单向各向异性
Unidirectional anisotropy in cubic FeGe with antisymmetric spin-spin-coupling
摘要：
我们报告强单向各向异性块体多晶B20 FeGe铁磁共振谱测量。批量和微米尺寸的样品生产和分析表征。FeGe是一种B20化合物，具有固有的Dzyaloshinskiii-Moriya相互作用。洛伦兹显微镜证实了在150 mT的磁场中在$190 \; \text{K}$处的skyrmion晶格。在居里温度附近的$276 \; \text{K} \pm 1 \; \text{K}$处测量铁磁共振。观察到两种共振模式，都表现出单向各向异性的$K=1153 \; \text{J/m}^3 \pm 10 \; \text{J/m}^3$在初级，和$K=28 \; \text{J/m}^3 \pm 2 \; \text{J/m}^3$在次级模式，以前未知的散装铁磁体。此外，在室温下（$\sim \; 293$ K）测量，在微米尺寸的FeGe楔内观察到约25个自旋驻波模。这些模式也表现出单向各向异性。
英文摘要：
We report strong unidirectional anisotropy in bulk polycrystalline B20 FeGe measured by ferromagnetic resonance spectroscopy. Bulk and micron-sized samples were produced and analytically characterized. FeGe is a B20 compound with inherent Dzyaloshinskii-Moriya interaction. Lorenz microscopy confirms a skyrmion lattice at $190 \; \text{K}$ in a magnetic field of 150 mT. Ferromagnetic resonance was measured at $276 \; \text{K} \pm 1 \; \text{K}$, near the Curie temperature. Two resonance modes were observed, both exhibit a unidirectional anisotropy of $K=1153 \; \text{J/m}^3 \pm 10 \; \text{J/m}^3$ in the primary, and $K=28 \; \text{J/m}^3 \pm 2 \; \text{J/m}^3$ in the secondary mode, previously unknown in bulk ferromagnets. Additionally, about 25 standing spin wave modes are observed inside a micron-sized FeGe wedge, measured at room temperature ($\sim \; 293$ K). These modes also exhibit unidirectional anisotropy.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
