Raman Scattering and Infrared Spectroscopy of Chemically Substituted Sr2LnTaO6(Ln = Lanthanides, Y, and In) Double Perovskites
Source abstract
Abstract
Sr 2 LnTaO 6 (Ln = lanthanides, Y, and In) ceramics were prepared by a solid-state route, and their vibrational phonon modes were investigated using Raman and infrared (IR) spectroscopic techniques. Lorentzian lines were used to fit the Raman spectra, which showed 24 bands in perfect agreement with theoretical calculations. The IR spectra were fitted with a four-parameter semiquantum model, and the results showed 17 bands for the materials. The position and width of the phonon modes were determined and correlated to the ionic radii for the different atoms substituted in the B′-site. It was verified that all materials belong to the monoclinic P 2 1 / n ( C 2 h 5 ) structure.
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Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Departamento de Química, Universidade Federal de Ouro Preto, Campus Morro do Cruzeiro, ICEB II, Ouro Preto-MG, 35400-000, Brazil, Materials and Minerals Division, National Institute for Interdisciplinary Science and Technology, Trivandrum-695 019, India, and Departamento de Física, Universidade Federal de Minas Gerais, C.P. 702, Belo Horizonte-MG, 30123-970, Brazil
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