title: Frustration of ferroelectricity in epitaxial film of relaxor ferroelectric PbSc1/2Nb1/2O3.
abstract: Relaxor-to-ferroelectric transformations induced by varying electric fields and temperatures are studied experimentally in acube-on-cubetype epitaxial PbSc(1/2)Nb(1/2)O3 film grown on La(1/2)Sr(1/2)CoO3/MgO(001). Dielectric response, quasi-static and dynamic polarization, and dynamic current-voltage characteristics evidence the absence of spontaneous relaxor-to-ferroelectric transition. The electricfield-induced transformation from a glass-like relaxor state to a new dynamic polar state is detected at low temperatures below 100 K only. The frustration of ferroelectricity is discussed in relation to orientational anisotropy of the dipolar system in the epitaxial (001) film.
authors.affiliation: Microelectronics and Materials Physics Laboratories, University of Oulu, PO Box 4500, FI-90014 Oulunyliopisto, Finland.
authors.forename: M
authors.initials: M
authors.lastname: Tyunina
authors.forename: I
authors.initials: I
authors.lastname: Pintilie
authors.forename: A
authors.initials: A
authors.lastname: Iuga
authors.forename: M S
authors.initials: MS
authors.lastname: Stratulat
authors.forename: L
authors.initials: L
authors.lastname: Pintilie