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Micro-Structure and Vibrational Mode of Complex Double Perovskite Oxides xLaAlO3 – (1-x)Ba(Mg1/2 W1/2 )O3

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Title Micro-Structure and Vibrational Mode of Complex Double Perovskite Oxides xLaAlO3 – (1-x)Ba(Mg1/2 W1/2 )O3
 
Creator Patra, B
Ghosh, B
Banerjee, S
Sinha, T P
 
Subject Complex double perovskite oxides
Crystal structure
Phonon modes
 
Description 496-503
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.
 
Date 2021-07-19T06:53:41Z
2021-07-19T06:53:41Z
2021-07
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscair.res.in/handle/123456789/57728
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJPAP Vol.59(07) [July 2021]