Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/57728
Title: Micro-Structure and Vibrational Mode of Complex Double Perovskite Oxides xLaAlO3 – (1-x)Ba(Mg1/2 W1/2 )O3
Authors: Patra, B
Ghosh, B
Banerjee, S
Sinha, T P
Keywords: Complex double perovskite oxides;Crystal structure;Phonon modes
Issue Date: Jul-2021
Publisher: NIScPR-CSIR, India
Abstract: The micro-structures and vibrational modes of complex double perovskite oxides xLaAlO3 – (1-x)Ba(Mg1/2 W1/2 )O3[LABMW] have been characterized for different values of x (0.10, 0.25, 0.50, 0.75 and 0.90). The materials are synthesized by the solid state reaction technique. The Rietveld refinement of the XRD patterns shows rhombohedral R3􀴤C(161) phase for LaAlO3 and cubic Fm3m (225) phases for Ba(Mg1/2W1/2)O3. XRD patterns show that with increasing the doping concentration ‘x’, rhombohedral phase gradually increases and cubic phase gradually decreases. A meticulous comparison of crystal structures and vibrational degrees of freedom in the light of change in doping concentration ‘x’ for LA-BMW has been carried out for accurate identification of crystal symmetry and distortions. From room-temperature comparative Raman spectra of the samples, different vibrational phonon modes have been assigned using group theoretical analysis together with experimental literature survey.
Page(s): 496-503
URI: http://nopr.niscair.res.in/handle/123456789/57728
ISSN: 0975-0959 (Online); 0301-1208 (Print)
Appears in Collections:IJPAP Vol.59(07) [July 2021]

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