Raman signatures of monoclinic distortion in (Ba${}_{1-x}$Sr${}_x$)${}_3$CaNb${}_2$O${}_9$ complex perovskites

J. E. Rodrigues, D. M. Bezerra, R. C. Costa +2

Octahedral tilting is most common distortion process observed in centrosymmetric perovskite compounds (ABO${}_3$). Indeed, crucial physical properties of this oxide stem from the t…