非弹性中子散射谱仪的物理应用

现代工业以及日常生活中离不开各种各样的高性能材料,这些材料优异的性质取决于其微观结构或者动力学行为。对复杂材料例如高温超导体、量子磁性材料、低维半导体、拓扑磁性材料、磁相变材料、热电材料等,其内部自旋、轨道、电荷、声子多体相互作用是关键因素。     

Magneto-Elastic Coupling in a Sinusoidal Modulated Magnet Cr2GaN

We use neutron powder diffraction to investigate the magnetic and crystalline structure of Cr₂GaN. A magnetic phase transition is identified at T ≈ 170 K, whereas no trace of structural transition is observed down to 6 K. Combining Rietveld refinement with irreducible representations, the spin configuration of Cr ions in Cr₂GaN is depicted as an incommensurate sinusoidal modulated structure characterized by a propagating vector k =(0.365, 0.365, 0). Upon warming up to the p...