论文标题
MM大小的Ba $ _ {2} $ mgwo $ _ {6} $单晶合成的结构，热量和拉曼光谱
Structure, heat capacity and Raman spectra of mm-sized Ba$_{2}$MgWO$_{6}$ single crystals synthesized by BaCl$_{2}$-MgCl$_{2}$ flux method
论文作者
论文摘要
我们提出了一种新方法Ba $ _ {2} $ MGWO $ _ {6} $单晶合成，该合成允许使用BACL $ _ {2} $和MGCL $ _ {2} $ Flux种植较大的晶体。种植适合宏观材料特性测量的单晶的困难导致大多数表征在多晶样品上发表。单晶衍射和能量分散X射线分析证实了合成样品的高质量。从300〜K到2〜K的热容量测量没有显示任何过渡。然而，在所有探测的温度下，测量到77 k的拉曼光谱都包含其他峰，这与可还原代表预期的4种拉曼活跃模式形成鲜明对比。这需要对潜在的对称破坏进行更详细的研究，这也可能影响材料的电子特性。
We present a new method of Ba$_{2}$MgWO$_{6}$ single crystal synthesis that allows to grow larger crystals using BaCl$_{2}$ and MgCl$_{2}$ flux. Difficulties to grow single crystal of a size suitable for macroscopic material property measurements caused the majority of characterisation being published on polycrystalline samples. Single crystal diffraction and energy dispersive X-ray analysis confirmed high quality of synthesised samples. Heat capacity measurements from 300~K to 2~K do not show any transitions. However, Raman spectra measured down to 77~K contain additional peaks at all temperatures probed, which is in a contrast with only 4 Raman active modes expected from the reducible representation. This calls for a more detailed study of potential symmetry breaking that could also influence the electronic properties of the material.
