论文标题
正弦调制的磁铁Cr $ _2 $ gan中的磁弹性耦合
Magneto-elastic coupling in a sinusoidal modulated magnet Cr$_2$GaN
论文作者
论文摘要
我们使用中子粉末衍射来研究Cr $ _2 $ gan的磁性和结晶结构。在$ t \约170 $ K处确定了磁相过渡，而没有观察到的结构过渡痕迹向6 k。将rietveld的改进与不可约的表示相结合，cr $ _2 $ gan中Cr cr ions的旋转配置描绘为不持持不透明的正弦调节结构。 0）。在加热到顺磁性状态后，磁顺序参数与$ c $轴晶格参数的温度依赖性非常相似，这表明该化合物中的强磁弹性耦合强。因此，Cr $ _2 $ GAN为探索磁性调谐特性（例如磁电，磁磁性和磁静电效应及其应用）提供了潜在的平台。
We use neutron powder diffraction to investigate the magnetic and crystalline structure of Cr$_2$GaN. A magnetic phase transition is identified at $T \approx 170$ 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 Cr$_2$GaN is depicted as an incommensurate sinusoidal modulated structure characterized by a propagating vector ${k}$=(0.365, 0.365, 0). Upon warming up to the paramagnetic state, the magnetic order parameter closely resembles to the temperature dependence of $c$-axis lattice parameter, suggesting strong magneto-elastic coupling in this compound. Therefore, Cr$_2$GaN provides a potential platform for the exploration of magnetically tuned properties such as magnetoelectric, magnetostrictive and magnetocaloric effects, as well as their applications.
