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Stuffed Tridymite Structures: Synthesis, Structure, Second Harmonic Generation, Optical, and Multiferroic Properties
Author(s) -
Bhim Anupam,
Sutter JeanPascal,
Gopalakrishnan Jagannatha,
Natarajan Srinivasan
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202004078
Subject(s) - multiferroics , rietveld refinement , materials science , powder diffraction , ferroelectricity , tridymite , raman spectroscopy , ferromagnetism , crystallography , second harmonic generation , metal , crystal structure , chemistry , optics , condensed matter physics , optoelectronics , physics , dielectric , laser , quartz , cristobalite , metallurgy , composite material
The stuffed tridymite structure Ba(Zn/Co) 1− x Si 1− x M 2 x O 4 (M=Al 3+ and Fe 3+ ) 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 P 63 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 Co 2+ and Fe 3+ in the structure gives rise to a weak ferromagnetic behavior to the compound, BaCo 0.75 Si 0.75 Fe 0.5 O 4 , making it a multiferroic material. The optical studies on the prepared compounds exhibited blue color (Co 2+ in T d geometry), purple color (Ni 2+ in T d geometry), and simultaneous substitution of Co 2+ and Fe 3+ gives rise to blue‐green color owing to metal‐to‐metal charge transfer (MMCT) effect.