Phase transitions in Sr0.61Ba0.39Nb2O6:Ce3+: I. Susceptibility of clusters and domains J. Dec, W. Kleemann, Th. Woike and R. Pankrath Eur. Phys. J. B, 14 4 (2000) 627-632 Published online: 15 April 2000 DOI: 10.1007/s100510051071