Three-State Ferroelastic Switching and Large Electromechanical Responses in PbTiO3 Thin Films

Three-State Ferroelastic Switching and Large Electromechanical Responses in PbTiO3 Thin Films

© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 29(2017), 37 vom: 27. Okt.
1. Verfasser: Damodaran, Anoop R (VerfasserIn)
Weitere Verfasser: Pandya, Shishir, Agar, Josh C, Cao, Ye, Vasudevan, Rama K, Xu, Ruijuan, Saremi, Sahar, Li, Qian, Kim, Jieun, McCarter, Margaret R, Dedon, Liv R, Angsten, Tom, Balke, Nina, Jesse, Stephen, Asta, Mark, Kalinin, Sergei V, Martin, Lane W
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2017
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article electromechanical responses ferroelectrics thin-film epitaxy three-state ferroelastic switching
Beschreibung
Zusammenfassung:© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Leveraging competition between energetically degenerate states to achieve large field-driven responses is a hallmark of functional materials, but routes to such competition are limited. Here, a new route to such effects involving domain-structure competition is demonstrated, which arises from strain-induced spontaneous partitioning of PbTiO3 thin films into nearly energetically degenerate, hierarchical domain architectures of coexisting c/a and a1 /a2 domain structures. Using band-excitation piezoresponse force microscopy, this study manipulates and acoustically detects a facile interconversion of different ferroelastic variants via a two-step, three-state ferroelastic switching process (out-of-plane polarized c+ → in-plane polarized a → out-of-plane polarized c- state), which is concomitant with large nonvolatile electromechanical strains (≈1.25%) and tunability of the local piezoresponse and elastic modulus (>23%). It is further demonstrated that deterministic, nonvolatile writing/erasure of large-area patterns of this electromechanical response is possible, thus showing a new pathway to improved function and properties
Beschreibung:Date Completed 18.07.2018
Date Revised 30.09.2020
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.201702069