A new low-temperature state in a La-modified lead zirconate titanate relaxor R. Farhi, M. El Marssi, J.-L. Dellis, M. D. Glinchuk and V. A. Stephanovich Europhys. Lett., 46 3 (1999) 351-356 Published online: 01 September 2002 DOI: 10.1209/epl/i1999-00268-x