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

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Title Statement <strong>Micro-Structure and Vibrational Mode of Complex Double Perovskite Oxides xLaAlO3 – (1-x)Ba(Mg1/2 W1/2 )O3</strong>
 
Added Entry - Uncontrolled Name Ghosh, Binita ; St. Paul's Cathedral Mission College, Kolkata .
Patra, Bivas ; Department of Physics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata -700009, India
Banerjee, Sourish ; Department of Physics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata -700009.
Sinha, T.P. ; Department of Physics, Bose Institute, 93/1 Acharya Prafulla Chandra Road, Kolkata -700009.
 
Uncontrolled Index Term Solid state physics
Complex double perovskite oxides; Crystal structure; Phonon modes
 
Summary, etc. <p>The micro-structures and vibrational modes of complex double perovskite oxides xLaAlO<sub>3 </sub>– (1-x)Ba(Mg<sub>1/2 </sub>W<sub>1/2 </sub>)O<sub>3</sub>[LA-BMW] 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 (161) phase for LaAlO<sub>3</sub> and cubic  (225) phases for Ba(Mg<sub>1/2</sub>W<sub>1/2</sub>)O<sub>3</sub>. 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.</p>
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2021-07-13 15:08:30
 
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http://op.niscair.res.in/index.php/IJPAP/article/view/42177
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 59, ##issue.no## 7 (2021): Indian Journal of Pure & Applied Physics
 
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