Phonon spectra of pure and acceptor doped BaZrO3 investigated with visible and UV Raman spectroscopy
Artikel i vetenskaplig tidskrift, 2020

We report results from visible and UV Raman spectroscopy studies of the phonon spectra of a polycrystalline sample of the prototypical perovskite type oxide BaZrO3 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. These results encourage further use of UV Raman spectroscopy as a novel approach for the study of lattice vibrational dynamics and local structure in proton conducting perovskites, and open up for, e.g., time-resolved experiments on thin films targeted at understanding the role of lattice vibrations in proton transport in these kinds of materials.

Författare

Laura Mazzei

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi 2

D. Rukser

Universität Hamburg

F. Biebl

Universität Hamburg

B. Grimm-Lebsanft

Universität Hamburg

G. Neuber

Universität Hamburg

D. Pergolesi

Paul Scherrer Institut

Lars Börjesson

Chalmers, Fysik, Materialfysik

M. Rübhausen

Universität Hamburg

Jakob Andreasson

Chalmers, Fysik, Materialfysik

Czech Academy of Sciences

Maths Karlsson

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi 2

Journal of Physics Condensed Matter

0953-8984 (ISSN)

Vol. 32 40 405403

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

Den kondenserade materiens fysik

DOI

10.1088/1361-648X/ab95d1

Mer information

Senast uppdaterat

2020-08-28