Electrocaloric effect in a ferroelectric Pb(Zn1/3Nb2/3)O3-PbTiO3 single crystal - Valant,M; Dunne,LJ; Axelsson,A-K; Alford,NM; Manos,G; Perantie,J; Hagberg,J; Jantunen,H; Dabkowski,A (PHYSICAL REVIEW B, 2010)