Study of Na substitution in La0.67Ba0.33MnO3 perovskites

Hcini, Sobhi; Boudard, Michel; Zemni, S.

doi:10.1007/s00339-013-7919-5

Cited by 20 publications

(1 citation statement)

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“…Perovskite manganese oxide, widely known with chemical formula RE1-xAxMnO3 (RE is rare eath metals, and A is monovalent or divalent ions), have been studied massively due to its unique physical phenomena such as CMR (colossal magnetoresistance), MCE (magnetocaloric effect), resistivity behavior (temperature transition metal to insulator), charge ordering, orbital ordering, spin ordering, isotope effect, microwave absorption, etc [1].…”

Section: Introductionmentioning

confidence: 99%

Structural and Morphological La0.85-xBaxNa0.15MnO3 (x = 0, 0.05, 0.10 and 0.15) Perovskite Manganite

Rahman

Kurniawan

Razaq

et al. 2020

KEM

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Bulk polycrystalline samples La0.85-xBaxNa0.15MnO3 (x = 0, 0.05, 0.10 and 0.15) manganites were synthesized by the sol-gel route. The effect of Barium (Ba) existence on the structural and morphological was investigated by X-ray diffraction (XRD) and Scanning Electron Microscope (SEM). The structural parameters were obtained using Rietveld refinement of the XRD pattern. It was revealed the structures of compounds have rhombohedral with R-3c space group without any impurities phase. Furthermore, several changes are found to exist due to Ba substitution such as the lattice parameter, unit cells volume, average crystallite size, average Mn-O bond length (<Mn – O>) and average Mn-O-Mn bond angle (<Mn – O – Mn>). The changes in <Mn – O> and <Mn – O – Mn> due to Ba substitution, affects the double exchange interaction of the samples. SEM images reveal the existence of Ba also affects the morphology of the studied samples, which consisted of polygonal grains with homogeneous chemical composition.

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Section: Introductionmentioning

confidence: 99%