Print Email Facebook Twitter Anisotropic dislocation-domain wall interactions in ferroelectrics Title Anisotropic dislocation-domain wall interactions in ferroelectrics Author Zhuo, Fangping (Technische Universität Darmstadt) Zhou, Xiandong (Technische Universität Darmstadt) Gao, Shuang (Technische Universität Darmstadt; Southwest Jiaotong University) Höfling, Marion (Technical University of Denmark) Braga Groszewicz, P. (TU Delft RST/Storage of Electrochemical Energy) Fulanović, Lovro (Technische Universität Darmstadt) Tan, Xiaoli (Iowa State University) Koruza, Jurij (Graz University of Technology) Damjanovic, Dragan (Swiss Federal Institute of Technology) Rödel, Jürgen (Technische Universität Darmstadt) Date 2022 Abstract Dislocations are usually expected to degrade electrical, thermal and optical functionality and to tune mechanical properties of materials. Here, we demonstrate a general framework for the control of dislocation–domain wall interactions in ferroics, employing an imprinted dislocation network. Anisotropic dielectric and electromechanical properties are engineered in barium titanate crystals via well-controlled line-plane relationships, culminating in extraordinary and stable large-signal dielectric permittivity (≈23100) and piezoelectric coefficient (≈2470 pm V–1). In contrast, a related increase in properties utilizing point-plane relation prompts a dramatic cyclic degradation. Observed dielectric and piezoelectric properties are rationalized using transmission electron microscopy and time- and cycle-dependent nuclear magnetic resonance paired with X-ray diffraction. Succinct mechanistic understanding is provided by phase-field simulations and driving force calculations of the described dislocation–domain wall interactions. Our 1D-2D defect approach offers a fertile ground for tailoring functionality in a wide range of functional material systems. To reference this document use: http://resolver.tudelft.nl/uuid:dfb87d95-4f18-4ce2-b2ca-be55b5c7f5b5 DOI https://doi.org/10.1038/s41467-022-34304-7 ISSN 2041-1723 Source Nature Communications, 13 (1) Part of collection Institutional Repository Document type journal article Rights © 2022 Fangping Zhuo, Xiandong Zhou, Shuang Gao, Marion Höfling, P. Braga Groszewicz, Lovro Fulanović, Xiaoli Tan, Jurij Koruza, Dragan Damjanovic, Jürgen Rödel, More Authors Files PDF s41467_022_34304_7.pdf 4.86 MB Close viewer /islandora/object/uuid:dfb87d95-4f18-4ce2-b2ca-be55b5c7f5b5/datastream/OBJ/view