Tuning of nonlinear optical and ferroelectric properties via the cationic composition of Ca9.5–1.5Bi Cd(VO4)7 solid solutions
| Autor: | Alexei A. Belik, Vladimir A. Morozov, O. V. Baryshnikova, Bogdan I. Lazoryak, Nikolai G. Dorbakov, S. Yu. Stefanovich, Masahiko Tanaka, Yoshio Katsuya |
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| Rok vydání: | 2017 |
| Předmět: |
Diffraction
Phase transition Materials science Mechanical Engineering Analytical chemistry Second-harmonic generation 02 engineering and technology Dielectric Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity 0104 chemical sciences Crystallography Mechanics of Materials lcsh:TA401-492 lcsh:Materials of engineering and construction. Mechanics of materials General Materials Science 0210 nano-technology Order of magnitude Solid solution |
| Zdroj: | Materials & Design, Vol 116, Iss, Pp 515-523 (2017) |
| ISSN: | 0264-1275 |
| DOI: | 10.1016/j.matdes.2016.11.107 |
| Popis: | Ca9.5–1.5xBixCd(VO4)7 (0 ≤ x ≤ 1) solid solutions with the whitlockite-type structure (SG R3c) were synthesized by a standard solid-state method in air. Structures of Ca9.5–1.5xBixCd(VO4)7 (x = 0.167, 0.5, 0.833) were refined by the Rietveld method from synchrotron powder X-ray diffraction data. Nonlinear optical properties of the whitlockite-type compounds can be designed and increased by an order of magnitude through appropriate isovalent and aliovalent substitutions for Ca2+ cations. Dielectric and temperature second harmonic generation investigations revealed the presence of a reversible ferroelectric phase transition in the range from 1331 K to 1055 K. The phase transition temperature monotonically decreases while nonlinear optical activity of Ca9.5–1.5xBixCd(VO4)7 strongly increases with increasing Bi3+ content. Keywords: Vanadates, Ferroelectric properties, Nonlinear optical properties, Crystal structure |
| Databáze: | OpenAIRE |
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