title: Ferroelectric and ferroelastic domain wall motion in unconstrained Pb(Zr,Ti)O3 microtubes and thin films.
abstract: Ferroelectric polarization switching of high aspect ratio (>80:1) PbZr(0.52)Ti(0.48)O(3) (PZT) microtubes with a wall thickness of ~200 nm was investigated. A charge-based technique was used to assess the dielectric and ferroelectric properties of individual mechanically-unconstrained PZT microtubes with interdigitated electrodes. An enhancement in the degree of ferroelastic (non-180 degrees ) domain wall motion was observed in the tubes relative to films of similar thickness on rigid substrates. The dielectric response of the tubes showed a Rayleigh-like ac field dependence over a wide temperature range; the extent of the extrinsic contribution to the dielectric response dropped as the temperature approached 10K, but remained finite. This work demonstrates a general methodology for directly electrically addressing small, unconstrained ferroelectric devices, extending the range of driving fields and temperatures over which these materials can be probed.
authors.affiliation: Materials Research Institute, The Pennsylvania State University, University Park, PA, USA. bss11@psu.edu
authors.forename: Srowthi
authors.initials: S
authors.lastname: Bharadwaja
authors.forename: Paul
authors.initials: P
authors.lastname: Moses
authors.forename: Susan
authors.initials: S
authors.lastname: Trolier-McKinstry
authors.forename: Theresa
authors.initials: T
authors.lastname: Mayer
authors.forename: Paolo
authors.initials: P
authors.lastname: Bettotti
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Pavesi