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Title: Nanoscale ferroelastic twins formed in strained LaCoO3 films

Abstract

The coexistence and coupling of ferroelasticity and magnetic ordering in a single material offers a great opportunity to realize novel devices with multiple tuning knobs. Complex oxides are a particularly promising class of materials to find multiferroic interactions due to their rich phase diagrams, and are sensitive to external perturbations. Still, there are very few examples of these systems. Here, we report the observation of twin domains in ferroelastic LaCoO3epitaxial films and their geometric control of structural symmetry intimately linked to the material’s electronic and magnetic states. A unidirectional structural modulation is achieved by selective choice of substrates having twofold rotational symmetry. This modulation perturbs the crystal field–splitting energy, leading to unexpected in-plane anisotropy of orbital configuration and magnetization. These findings demonstrate the use of structural modulation to control multiferroic interactions and may enable a great potential for stimulation of exotic phenomena through artificial domain engineering.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [4]; ORCiD logo [5]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [6]; ORCiD logo [2]; ORCiD logo [7]; ORCiD logo [2]
+ Show Author Affiliations
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics and Inst. of Physics; Univ. of Chinese Academy of Sciences, Beijing (China). Center of Materials Science and Optoelectronics Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  4. Arizona State Univ., Tempe, AZ (United States). Eyring Materials Center
  5. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Martin-Luther-Univ. Halle-Wittenberg, Halle (Saale) (Germany). Inst. for Physics
  7. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1511915
Alternate Identifier(s):
OSTI ID: 1560861
Grant/Contract Number:  
AC05-00OR22725; AC02-06CH1135; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 5; Journal Issue: 3; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Guo, Erjia, Desautels, Ryan D., Keavney, David J., Roldan, Manuel, Kirby, Brian J., Lee, Dongkyu, Liao, Zhaoliang, Charlton, Timothy R., Herklotz, Andreas, Ward, T. Zac, Fitzsimmons, Michael R., and Lee, Ho Nyung. Nanoscale ferroelastic twins formed in strained LaCoO3 films. United States: N. p., 2019. Web. doi:10.1126/sciadv.aav5050.
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Guo, Erjia, Desautels, Ryan D., Keavney, David J., Roldan, Manuel, Kirby, Brian J., Lee, Dongkyu, Liao, Zhaoliang, Charlton, Timothy R., Herklotz, Andreas, Ward, T. Zac, Fitzsimmons, Michael R., & Lee, Ho Nyung. Nanoscale ferroelastic twins formed in strained LaCoO3 films. United States. https://doi.org/10.1126/sciadv.aav5050
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Guo, Erjia, Desautels, Ryan D., Keavney, David J., Roldan, Manuel, Kirby, Brian J., Lee, Dongkyu, Liao, Zhaoliang, Charlton, Timothy R., Herklotz, Andreas, Ward, T. Zac, Fitzsimmons, Michael R., and Lee, Ho Nyung. Fri . "Nanoscale ferroelastic twins formed in strained LaCoO3 films". United States. https://doi.org/10.1126/sciadv.aav5050. https://www.osti.gov/servlets/purl/1511915.
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@article{osti_1511915,
title = {Nanoscale ferroelastic twins formed in strained LaCoO3 films},
author = {Guo, Erjia and Desautels, Ryan D. and Keavney, David J. and Roldan, Manuel and Kirby, Brian J. and Lee, Dongkyu and Liao, Zhaoliang and Charlton, Timothy R. and Herklotz, Andreas and Ward, T. Zac and Fitzsimmons, Michael R. and Lee, Ho Nyung},
abstractNote = {The coexistence and coupling of ferroelasticity and magnetic ordering in a single material offers a great opportunity to realize novel devices with multiple tuning knobs. Complex oxides are a particularly promising class of materials to find multiferroic interactions due to their rich phase diagrams, and are sensitive to external perturbations. Still, there are very few examples of these systems. Here, we report the observation of twin domains in ferroelastic LaCoO3epitaxial films and their geometric control of structural symmetry intimately linked to the material’s electronic and magnetic states. A unidirectional structural modulation is achieved by selective choice of substrates having twofold rotational symmetry. This modulation perturbs the crystal field–splitting energy, leading to unexpected in-plane anisotropy of orbital configuration and magnetization. These findings demonstrate the use of structural modulation to control multiferroic interactions and may enable a great potential for stimulation of exotic phenomena through artificial domain engineering.},
doi = {10.1126/sciadv.aav5050},
journal = {Science Advances},
number = 3,
volume = 5,
place = {United States},
year = {Fri Mar 29 00:00:00 EDT 2019},
month = {Fri Mar 29 00:00:00 EDT 2019}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1126/sciadv.aav5050
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Cited by: 30 works
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Figures / Tables:

Fig. 1 Fig. 1: 1D ferroelastic twinning domain is observed in an LCO thin film. (A) Schematic of 1D periodic twin domains. Twinning domains constitute a spatially unidirectional structural modulation along the [100] orientation. The domains are parallel to the step-edge direction of substrate. α and β are the miscut direction andmore » miscut angle for a vicinal substrate, respectively. The inset shows a sketch of the monoclinically distorted LCO lattice at the ferroelastic domain wall. Notably, the tilt angle between two twin domains is γ = 2.2 ± 0.1°, derived from x-ray diffraction measurements (extended data fig. S1). (B) Top view of the stripe-like ferroelastic twin domains. Two different colors represent differently oriented ferroelastic domains with an average periodicity ζ. (C) Reciprocal space map (RSM) of an LCO film around the substrate’s 103 reflection. RSMs are recorded by azimuthally rotating the sample with a step size of 90° with respect to the surface’s normal. The LCO films have a monoclinically distorted lattice structure evidenced by the different qz spacing between the film’s peak and substrate’s peak. Two splitting satellite reflections at the same qz are shown for h03 reflections but are absent for 0k3 reflections. (D) Rocking curve scans around the LCO 002 reflections as a function of the in-plane rotation angle φ in a step of 10°. The real-space reflection angles are transformed into the reciprocal space wave vectors, from which we calculated ζ = 1/Δqx ~ 10 nm. A cosine modulation of the satellite peak position indicates that the domain structure is strictly aligned perpendicular to the [100] orientation.« less
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    Works referencing / citing this record:

    Direct imaging revealing halved ferromagnetism in tensile-strained LaCo O 3 thin films
    journal, July 2019

    Maximization of ferromagnetism in LaCo O 3 films by competing symmetry
    journal, November 2019

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