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Updated: Jun 22, 2026

Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
Published on: March 27, 2018
Vibrational spectroscopy and electron-phonon interactions in microwave-hydrothermal synthesized Ba(Mn1/3Nb2/3)O3
Anderson Dias1, Franklin M Matinaga, Roberto L Moreira
1Departamento de Química, Universidade Federal de Ouro Preto, Campus Morro do Cruzeiro, ICEB II, Sala 67, Ouro Preto-MG, 35400-000, Brazil. anderson_dias@iceb.ufop.br
Abstract:
Ba(Mn1/3Nb2/3)O3 ceramics were synthesized by the microwave-hydrothermal process. Crystalline, single-phase, needle-like materials were obtained with high anisotropy and aspect ratio. Large crystals could be prepared from a direct combination of nanosized crystals under microwaves through an oriented attachment mechanism. Infrared and Raman spectroscopies showed perfect agreement with group-theoretical approaches for a trigonal, P3m1 structure. Franck-Condon modes were identified in Raman scattering experiments conducted in different wavelengths, laser powers, and temperatures. The results showed that the Mn ions exhibit a particular role in the lattice dynamics in complex perovskites.
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