VARGHESE, Maneesha; DUTTINE, Mathieu; DUGGAL, Hitesh; PENIN, Nicolas; LEBRAUD, Eric; FARGUES, Alexandre; TOULEMONDE, Olivier

doi:10.1016/j.jssc.2022.123507

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VARGHESE, Maneesha
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

DUTTINE, Mathieu
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

DUGGAL, Hitesh
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Journal of Solid State Chemistry. 2022-11, vol. 315, p. 123507 (10 p.)

Elsevier

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A simple and cost-effective salt synthesis route toward refractory oxides of composition Sr 2 Ga 1-x Co x NbO 6 has been carried out. Herein, we report on the refinement of the set of parameters related to heat treatment to stabilize the ordered perovskite for cobalt content, x, ranging from 0.02 to 0.2. The parameters studied were the nature of the flux, the dwell temperature, the dwell time and the cooling rate for a given cobalt precursor. Our study relied on powder X-ray diffraction, UV-visiblenear IR (UV-vis-NIR), Electron Spin Resonance (ESR) and Nuclear Magnetic Resonance (NMR) experiments allowing us to better understand the room temperature electronic structure. The tuning of energy gap with the cobalt content, mixed spin state Co 3+ (Low Spin + Intermediate/High Spin) at room temperature and the brown shades of these materials render them the multifunctionality.< Réduire

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Mutifunctional material

Double Perovskite

Molten salt flux synthesis

Electron Spin Resonance

Nuclear Magnetic Resonance

UV-vis-NIR spectroscopy

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Molten salt flux synthesis of cobalt doped refractory double perovskite Sr 2CoxGa1-xNbO6: A spectroscopic investigation for multifunctional materials

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