Setter, N.Cross, L. E.2006-08-212006-08-212006-08-21198110.1080/00150198108223483https://infoscience.epfl.ch/handle/20.500.14299/233126An Optical Study of the Ferroelectric Relaxors Pb(Mg1/3nb2/3)O3,Pb(Sc1/2ta1/2)O3, and Pb(Sc1/2nb1/2)O3text::journal::journal article::research article