21–23 May 2018
Topland | Hotel & Convention Center Phitsanulok
Asia/Bangkok timezone

Single crystal growth of Zn$_x$Cu$_{1-x}$V$_2$O$_7$ (x = 0.05, 0.15) by the vertical gradient freezing technique

22 May 2018, 09:15
15m
Phetchabun Room

Phetchabun Room

Oral Condensed Matter Physics A6: Condensed Matter and Accelerators

Speaker

Dr Ganatee Gitgeatpong (Phranakhon Rajabhat University)

Description

Single crystals of Zn$_x$Cu$_{1-x}$V$_2$O$_7$ system with doping concentration of 0.05 and 0.15 were grown by the vertical gradient freezing technique. The crystal structures were confirmed by means of x-ray diffraction to be the beta phase of copper pyrovanadate, $\beta$-Cu$_2$V$_2$O$_7$, when the Zn concentration was as low as 0.05, on the contrary to the previous studies on polycrystal samples. The Rietveld refinement on x-ray diffraction patterns showed that that lattice constant along crystallographic a-axis was slightly increased when the doping concentration was decreased from x = 0.15 to 0.05. A $\theta$-2$\theta$ scan confirmed that the natural cleaved facet is crystallographic a-axis with FWHM around (200) peak of 0.17(1)$^\circ$, suggesting a high quality of the obtained single crystals.

Authors

Dr Ganatee Gitgeatpong (Phranakhon Rajabhat University) Dr Suebtarkul Suchat (Phranakhon Rajabhat University)

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