Bhim, A and Sutter, J-P and Gopalakrishnan, J and Natarajan, S (2020) Stuffed Tridymite Structures: Synthesis, Structure, Second Harmonic Generation, Optical, and Multiferroic Properties. In: Chemistry - A European Journal . (In Press)
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Abstract
The stuffed tridymite structure Ba(Zn/Co)1�xSi1�xM2xO4 (M=Al3+ and Fe3+) is explored for the possible multiferroic behavior and to develop new inorganic colored materials. The compounds were synthesized by employing conventional solid-state chemistry methods in the temperature range 1100�1175 °C for 24 h. The powder X-ray diffraction (PXRD) and Rietveld refinement studies indicate that the compounds stabilize in the P63 space group (no. 173). The refinement results were also rationalized by employing Raman spectroscopic studies. The compounds were found to be second harmonic generation (SHG) active and show weak ferroelectric behavior. The co-substitution of Co2+ and Fe3+ in the structure gives rise to a weak ferromagnetic behavior to the compound, BaCo0.75Si0.75Fe0.5O4, making it a multiferroic material. The optical studies on the prepared compounds exhibited blue color (Co2+ in Td geometry), purple color (Ni2+ in Td geometry), and simultaneous substitution of Co2+ and Fe3+ gives rise to blue-green color owing to metal-to-metal charge transfer (MMCT) effect. © 2020 Wiley-VCH GmbH
| Item Type: | Journal Article |
|---|---|
| Publication: | Chemistry - A European Journal |
| Publisher: | Wiley-VCH Verlag |
| Additional Information: | Copyright to this article belongs to Wiley-VCH Verlag |
| Keywords: | inorganic pigments · multiferroic materials · optical properties · second harmonic generation (SHG) · structure elucidation · stuffed tridymite · tetrahedral geometry |
| Department/Centre: | Division of Chemical Sciences > Solid State & Structural Chemistry Unit |
| Date Deposited: | 01 Feb 2021 09:16 |
| Last Modified: | 01 Feb 2021 09:16 |
| URI: | http://eprints.iisc.ac.in/id/eprint/67897 |
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