Journal article
Octahedral rotation patterns in strained EuFeO3 and other Pbnm perovskite films: Implications for hybrid improper ferroelectricity
Physical review. B, v 94(2)
07 Jul 2016
Abstract
We report the relationship between epitaxial strain and the crystallographic orientation of the in-phase rotation axis and A-site displacements in Pbnm-type perovskite films. Synchrotron diffraction measurements of EuFeO3 films under strain states ranging from 2% compressive to 0.9% tensile on cubic or rhombohedral substrates exhibit a combination of a(-)a(+)c(-) and a(+)a(-)c(-) rotational patterns. We compare the EuFeO3 behavior with previously reported experimental and theoretical work on strained Pbnm-type films on nonorthorhombic substrates, as well as additional measurements from LaGaO3, LaFeO3, and Eu0.7Sr0.3MnO3 films on SrTiO3. Compiling the results from various material systems reveals a general strain dependence in which compressive strain strongly favors a(-)a(+)c(-) and a(+)a(-)c(-) rotation patterns and tensile strain weakly favors a(-)a(-)c(+) structures. In contrast, EuFeO3 films grown on Pbnm-type GdScO3 under 2.3% tensile strain take on a uniform a(-)a(+)c(-) rotation pattern imprinted from the substrate, despite strain considerations that favor the a(-)a(-)c(+) pattern. These results point to the use of substrate imprinting as a more robust route than strain for tuning the crystallographic orientations of the octahedral rotations and A-site displacements needed to realize rotation-induced hybrid improper ferroelectricity in oxide heterostructures.
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Details
- Title
- Octahedral rotation patterns in strained EuFeO3 and other Pbnm perovskite films: Implications for hybrid improper ferroelectricity
- Creators
- A. K. Choquette - Drexel UniversityC. R. Smith - Drexel UniversityR. J. Sichel-Tissot - Drexel UniversityE. J. Moon - Drexel UniversityM. D. Scafetta - Drexel UniversityE. Di Gennaro - University of Naples Federico IIF. Miletto Granozio - University of Naples Federico IIE. Karapetrova - Argonne National LaboratoryS. J. May - Drexel UniversityArgonne National Lab. (ANL), Argonne, IL (United States)
- Publication Details
- Physical review. B, v 94(2)
- Publisher
- Amer Physical Soc
- Number of pages
- 8
- Grant note
- DMR-1151649 / National Science Foundation; National Science Foundation (NSF) DE-AC02-06CH11357 / DOE Office of Science by Argonne National Laboratory; United States Department of Energy (DOE) 1151649 / Division Of Materials Research; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000379702300003
- Scopus ID
- 2-s2.0-84978438202
- Other Identifier
- 991019167439804721
InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Physics, Applied
- Physics, Condensed Matter