Journal article
Insights into Chemical and Structural Order at Planar Defects in Pb 2 MgWO 6 Using Multislice Electron Ptychography
ACS nano, v 19(5), pp 5568-5576
27 Jan 2025
PMID: 39871489
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Switchable order parameters in ferroic materials are essential for functional electronic devices, yet disruptions of the ordering can take the form of planar boundaries or defects that exhibit distinct properties from the bulk, such as electrical (polar) or magnetic (spin) response. Characterizing the structure of these boundaries is challenging due to their confined size and three-dimensional (3D) nature. Here, a chemical antiphase boundary in the highly ordered double perovskite Pb
MgWO
is investigated using multislice electron ptychography. The boundary is revealed to be inclined along the electron beam direction with a finite width of chemical intermixing. Additionally, regions at and near the boundary exhibit antiferroelectric-like displacements, contrasting with the predominantly paraelectric matrix. Spatial statistics and density functional theory (DFT) calculations further indicate that despite their higher energy, chemical antiphase boundaries (APBs) form due to kinetic constraints during growth, with extended antiferroelectric-like distortions induced by the chemically frustrated environment in the proximity of the boundary. The three-dimensional imaging reveals the interplay between local chemistry and the polar environment, elucidating the role of antiphase boundaries and their associated confined structural distortions and offering opportunities for engineering ferroic thin films.
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Details
- Title
- Insights into Chemical and Structural Order at Planar Defects in Pb 2 MgWO 6 Using Multislice Electron Ptychography
- Creators
- Menglin Zhu - Massachusetts Institute of TechnologyMichael Xu - Massachusetts Institute of TechnologyYu Yun - Drexel UniversityLiyan Wu - Drexel UniversityOr Shafir - Bar-Ilan UniversityColin Gilgenbach - Massachusetts Institute of TechnologyLane W Martin - Rice UniversityIlya Grinberg - Bar-Ilan UniversityJonathan E Spanier - Drexel UniversityJames M LeBeau - Massachusetts Institute of Technology
- Publication Details
- ACS nano, v 19(5), pp 5568-5576
- Publisher
- ACS Publications
- Number of pages
- 9
- Grant note
- Army Research Office: W911NF-24-2-0100 Army Research Laboratory: W911NF-21-1-0126 Army Research Office
This research was sponsored by the Army Research Laboratory and was accomplished under Cooperative Agreement Number W911NF-24-2-0100. The views and conclusions contained in this document and those of the authors should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Laboratory or the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes, notwithstanding any copyright notation herein. L.W.M. and J.E.S. also acknowledge the support of the Army Research Office under W911NF-21-1-0126. This work made use of the MIT.nano Characterization Facilities.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:001408102300001
- Scopus ID
- 2-s2.0-85216465164
- Other Identifier
- 991022024211804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology