Formation of unusual nonferroic domains in TeO2 single crystals under external electric field

Kovalchuk, M. V.; Благов, А. Е.; Kulikov, A. S.; Marchenkov, N. V.; Pisarevsky, Yu. V.

doi:10.1134/s1063774514060145

Cited by 17 publications

(2 citation statements)

References 9 publications

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“…This phase transition is a result of oxygen vacancies migration, and the mechanism paves the way for managing the physical properties of materials. Structural changes observed in paratellurite TeO 2 in applied electric field [22][23][24][25] also are associated with oxygen vacancy migration. Contrary to SrTiO 3 , the TeO 2 crystal intrinsically possesses piezoelectric properties and its symmetry is described by a non-symmorphic space group, which provides a set of forbidden reflections in the reciprocal space.…”

Section: Introductionmentioning

confidence: 89%

Forbidden Reflections in TeO2 in the Vicinity of the Te L1 Absorption Edge

et al. 2020

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Examining forbidden reflections provides valuable information on electronic states and the local environment of resonant atoms in crystals. Experimental studies of two forbidden reflections 002 and 100 in TeO2 single crystals were performed at photon energies close to the L1 tellurium absorption edge. It was found that the spectral form corresponding to these two reflections looks almost identical, which is completely unexpected for a highly anisotropic material. Theoretical consideration shows that only one component fxy of the tensor describing dipole-dipole resonance scattering contributes to the 002 reflection, while two components fxy and fxz correspond to the 100 reflection. Numerical calculations show that the latter tensor component is comparable to the first one, but the combination of several geometric factors leads to the fact that its contribution to the spectrum is negligible. This explains the experimentally observed results. The finding shows a way for targeted investigation of single tensor components and makes it possible to compare different spectra and use them the study the physical phenomena in functional materials.

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Section: Introductionmentioning

confidence: 89%

Forbidden Reflections in TeO2 in the Vicinity of the Te L1 Absorption Edge

et al. 2020

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“…These techniques make it possible to obtain qualitative information about the defect structure of crystals, and they have already been used for the study of various objects, including the natural faces (edges) of grown crystals, 20) and samples under ultrasonic loading 21,22) and electric fields. 23) We used a laboratory X-ray tube with a molybdenum anode as the radiation source. The slits and monochromator crystalsymmetric Si(400) for RC measurements and asymmetric Si(440) for X-ray topographywere used to select only the Mo Kα 1 spectral line λ = 0.7039 Å.…”

Section: Experimental Methodsmentioning

confidence: 99%

Crystal growth and optical properties of Ca₃TaGa₃Si₂O₁₄ single crystals

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et al. 2018

Jpn. J. Appl. Phys.

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Transparent yellowish Ca 3 TaGa 3 Si 2 O 14 single crystals were grown in Ar+(0.5-3)% O 2 along the Y-axis by the Czochralski technique. The structural perfection of Ca 3 TaGa 3 Si 2 O 14 samples was studied by X-ray topography and rocking curve methods. Topograms and rocking curves along the surfaces of the Y-and Z-cuts were studied before and after surface treatments (polishing and etching). Transmittance spectra were measured in the wavelength range of 200-3300 nm. Optical anisotropy was studied along the X-and Z-axes, and dichroism along the X-axis. The dispersions of the refractive index N o and specific rotation of the polarization plane were determined using spectrophotometric methods.

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