Structure, heat capacity and Raman spectra of mm-sized Ba$_{2}$MgWO$_{6}$ single crystals synthesized by BaCl$_{2}$-MgCl$_{2}$ flux method

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.

Structure, heat capacity and Raman spectra of mm-sized Ba $_{2}$ MgWO $_{6}$ single crystals synthesized by BaCl $_{2}$ -MgCl $_{2}$ flux method

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Structure, heat capacity and Raman spectra of mm-sized Ba $_{2}$ MgWO $_{6}$ single crystals synthesized by BaCl $_{2}$ -MgCl $_{2}$ flux method

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Structure, heat capacity and Raman spectra of mm-sized Ba22​MgWO66​ single crystals synthesized by BaCl22​-MgCl22​ flux method

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Structure, heat capacity and Raman spectra of mm-sized Ba22​MgWO66​ single crystals synthesized by BaCl22​-MgCl22​ flux method

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Structure, heat capacity and Raman spectra of mm-sized Ba $_{2}$ MgWO $_{6}$ single crystals synthesized by BaCl $_{2}$ -MgCl $_{2}$ flux method

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Structure, heat capacity and Raman spectra of mm-sized Ba $_{2}$ MgWO $_{6}$ single crystals synthesized by BaCl $_{2}$ -MgCl $_{2}$ flux method

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