论文标题
搭扣Honeycomb Co $ _4 $ nb $ _2 $ o $ _9 $：一个单晶中子衍射研究
Noncollinear magnetic structure and magnetoelectric coupling in buckled honeycomb Co$_4$Nb$_2$O$_9$:A single crystal neutron diffraction study
论文作者
论文摘要
通过分析单晶中子衍射数据，我们在各种磁场下介绍了磁电CO4NB2O9的磁结构。在零场中，TN = 27 K以下的中子衍射实验表明，二氧化碳+矩量主要沿A*方向排序，而没有任何沿C轴旋转的旋转，并由磁对称对称性C2/c'表现出来。最近的邻居共同原子的时刻在铁磁上订购，沿着C轴沿着下一个最近的邻居矩矩不动。在施加的磁场H // a中，将三个磁域与垂直于磁场的主要磁矩对齐，没有磁相变向。讨论了磁场对与观察到的磁电耦合相关的磁结构的影响。
Through analysis of single crystal neutron diffraction data, we present the magnetic structures of magnetoelectric Co4Nb2O9 under various magnetic fields. In zero-field, neutron diffraction experiments below TN=27 K reveal that the Co2+ moments order primarily along the a* direction without any spin canting along the c axis, manifested by the magnetic symmetry C2/c'. The moments of nearest neighbor Co atoms order ferromagnetically with a small cant away from the next nearest neighbor Co moments along the c axis. In the applied magnetic field H//a, three magnetic domains were aligned with their major magnetic moments perpendicular to the magnetic field with no indication of magnetic phase transitions. The influences of magnetic fields on the magnetic structures associated with the observed magnetoelectric coupling are discussed.
