Phonon spectra of pure and acceptor doped BaZrO.sub.3./sub. investigated with visible and UV Raman spectroscopy

0537253 - FZÚ 2021 RIV GB eng J - Journal Article
Mazzei, L. - Rukser, D. - Biebl, F. - Grimm-Lebsanft, B. - Neuber, G. - Pergolesi, D. - Borjesson, L. - Rübhausen, M.A. - Andreasson, Jakob - Karlsson, M.
Phonon spectra of pure and acceptor doped BaZrO₃ investigated with visible and UV Raman spectroscopy.
Journal of Physics-Condensed Matter. Roč. 32, č. 40 (2020), s. 1-8, č. článku 405403. ISSN 0953-8984. E-ISSN 1361-648X
R&D Projects: GA MŠMT EF16_019/0000789
Grant - others:OP VVV - ADONIS(XE) CZ.02.1.01/0.0/0.0/16_019/0000789
Institutional support: RVO:68378271
Keywords : proton * oxide * resonance * Raman * vibration * short-range structure * barium zirconate * proton diffusion * oxygen vacancies * thin-films * degrees-c * band-gap
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.333, year: 2020
Method of publishing: Open access

We report results from visible and UV Raman spectroscopy studies of the phonon spectra of a polycrystalline sample of the prototypical perovskite type oxide BaZrO(3)and a 500 nm thick film of its Y-doped, proton conducting, counterpart BaZr0.8Y0.2O2.9. Analysis of the Raman spectra measured using different excitation energies (between 3.44 eV and 5.17 eV) reveals the activation of strong resonance Raman effects involving all lattice vibrational modes. Specifically, two characteristic energies were identified for BaZrO3, one around 5 eV and one at higher energy, respectively, and one for BaZr0.8Y0.2O2.9, above 5 eV. Apart from the large difference in spectral intensity between the non-resonant and resonant conditions, the spectra are overall similar to each other, suggesting that the vibrational spectra of the perovskites are stable when investigated using an UV laser as excitation source.
Permanent Link: http://hdl.handle.net/11104/0314989