Octahedral rotation patterns in strained EuFeO3 and other Pbnm perovskite films: Implications for hybrid improper ferroelectricity

Choquette, A. K.; Smith, C. R.; Sichel-Tissot, R. J.; Moon, E. J.; Scafetta, M. D.; Di Gennaro, E.; Miletto Granozio, F.; Karapetrova, E.; May, S. J.

doi:10.1103/PhysRevB.94.024105

Title: Octahedral rotation patterns in strained ${EuFeO}_{3}$ and other Pbnm perovskite films: Implications for hybrid improper ferroelectricity

Journal Article · Thu Jul 07 00:00:00 EDT 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.94.024105· OSTI ID:1394840

Choquette, A. K. ^[1]; Smith, C. R. ^[1]; Sichel-Tissot, R. J. ^[2]; Moon, E. J. ^[1]; Scafetta, M. D. ^[1]; Di Gennaro, E. ^[3]; Miletto Granozio, F. ^[3]; Karapetrova, E. ^[4]; May, S. J. ^[1]

Drexel Univ., Philadelphia, PA (United States). Dept. of Materials Science and Engineering
Drexel Univ., Philadelphia, PA (United States). Dept. of Materials Science and Engineering; Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Univ. of Naples Federico II (Italy)
Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division

Here, 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 EuFeO 3 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 Eu_0.7Sr_0.3 MnO₃ 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. Our 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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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Science Foundation (NSF)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1394840

Alternate ID(s):: OSTI ID: 1260861

Journal Information:: Physical Review B, Vol. 94, Issue 2; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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