Infrared nano-spectroscopy of ferroelastic domain walls in hybrid improper ferroelectric Ca3Ti2O7

K. A. Smith; E. A. Nowadnick; S. Fan; O. Khatib; S. J. Lim; B. Gao; N. C. Harms; S. N. Neal; J. K. Kirkland; M. C. Martin; C. J. Won; M. B. Raschke; S. W. Cheong; C. J. Fennie; G. L. Carr; H. A. Bechtel; J. L. Musfeldt

doi:10.1038/s41467-019-13066-9

Infrared nano-spectroscopy of ferroelastic domain walls in hybrid improper ferroelectric Ca₃Ti₂O₇

K. A. Smith, E. A. Nowadnick, S. Fan, O. Khatib, S. J. Lim, B. Gao, N. C. Harms, S. N. Neal, J. K. Kirkland, M. C. Martin, C. J. Won, M. B. Raschke, S. W. Cheong, C. J. Fennie, G. L. Carr, H. A. Bechtel, J. L. Musfeldt

Physics

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22 Scopus citations

Abstract

Ferroic materials are well known to exhibit heterogeneity in the form of domain walls. Understanding the properties of these boundaries is crucial for controlling functionality with external stimuli and for realizing their potential for ultra-low power memory and logic devices as well as novel computing architectures. In this work, we employ synchrotron-based near-field infrared nano-spectroscopy to reveal the vibrational properties of ferroelastic (90^∘ ferroelectric) domain walls in the hybrid improper ferroelectric Ca₃Ti₂O₇. By locally mapping the Ti-O stretching and Ti-O-Ti bending modes, we reveal how structural order parameters rotate across a wall. Thus, we link observed near-field amplitude changes to underlying structural modulations and test ferroelectric switching models against real space measurements of local structure. This initiative opens the door to broadband infrared nano-imaging of heterogeneity in ferroics.

Original language	English (US)
Article number	5235
Journal	Nature communications
Volume	10
Issue number	1
DOIs	https://doi.org/10.1038/s41467-019-13066-9
State	Published - Dec 1 2019

All Science Journal Classification (ASJC) codes

General Chemistry
General Biochemistry, Genetics and Molecular Biology
General Physics and Astronomy

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Smith, K. A., Nowadnick, E. A., Fan, S., Khatib, O., Lim, S. J., Gao, B., Harms, N. C., Neal, S. N., Kirkland, J. K., Martin, M. C., Won, C. J., Raschke, M. B., Cheong, S. W., Fennie, C. J., Carr, G. L., Bechtel, H. A., & Musfeldt, J. L. (2019). Infrared nano-spectroscopy of ferroelastic domain walls in hybrid improper ferroelectric Ca₃Ti₂O₇ Nature communications, 10(1), Article 5235. https://doi.org/10.1038/s41467-019-13066-9

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title = "Infrared nano-spectroscopy of ferroelastic domain walls in hybrid improper ferroelectric Ca3Ti2O7 ",

abstract = "Ferroic materials are well known to exhibit heterogeneity in the form of domain walls. Understanding the properties of these boundaries is crucial for controlling functionality with external stimuli and for realizing their potential for ultra-low power memory and logic devices as well as novel computing architectures. In this work, we employ synchrotron-based near-field infrared nano-spectroscopy to reveal the vibrational properties of ferroelastic (90∘ ferroelectric) domain walls in the hybrid improper ferroelectric Ca3Ti2O7. By locally mapping the Ti-O stretching and Ti-O-Ti bending modes, we reveal how structural order parameters rotate across a wall. Thus, we link observed near-field amplitude changes to underlying structural modulations and test ferroelectric switching models against real space measurements of local structure. This initiative opens the door to broadband infrared nano-imaging of heterogeneity in ferroics.",

author = "Smith, {K. A.} and Nowadnick, {E. A.} and S. Fan and O. Khatib and Lim, {S. J.} and B. Gao and Harms, {N. C.} and Neal, {S. N.} and Kirkland, {J. K.} and Martin, {M. C.} and Won, {C. J.} and Raschke, {M. B.} and Cheong, {S. W.} and Fennie, {C. J.} and Carr, {G. L.} and Bechtel, {H. A.} and Musfeldt, {J. L.}",

note = "Publisher Copyright: {\textcopyright} 2019, The Author(s).",

year = "2019",

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Smith, KA, Nowadnick, EA, Fan, S, Khatib, O, Lim, SJ, Gao, B, Harms, NC, Neal, SN, Kirkland, JK, Martin, MC, Won, CJ, Raschke, MB, Cheong, SW, Fennie, CJ, Carr, GL, Bechtel, HA & Musfeldt, JL 2019, 'Infrared nano-spectroscopy of ferroelastic domain walls in hybrid improper ferroelectric Ca₃Ti₂O₇ ', Nature communications, vol. 10, no. 1, 5235. https://doi.org/10.1038/s41467-019-13066-9

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AU - Khatib, O.

AU - Lim, S. J.

AU - Gao, B.

AU - Harms, N. C.

AU - Neal, S. N.

AU - Kirkland, J. K.

AU - Martin, M. C.

AU - Won, C. J.

AU - Raschke, M. B.

AU - Cheong, S. W.

AU - Fennie, C. J.

AU - Carr, G. L.

AU - Bechtel, H. A.

AU - Musfeldt, J. L.

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AB - Ferroic materials are well known to exhibit heterogeneity in the form of domain walls. Understanding the properties of these boundaries is crucial for controlling functionality with external stimuli and for realizing their potential for ultra-low power memory and logic devices as well as novel computing architectures. In this work, we employ synchrotron-based near-field infrared nano-spectroscopy to reveal the vibrational properties of ferroelastic (90∘ ferroelectric) domain walls in the hybrid improper ferroelectric Ca3Ti2O7. By locally mapping the Ti-O stretching and Ti-O-Ti bending modes, we reveal how structural order parameters rotate across a wall. Thus, we link observed near-field amplitude changes to underlying structural modulations and test ferroelectric switching models against real space measurements of local structure. This initiative opens the door to broadband infrared nano-imaging of heterogeneity in ferroics.

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Infrared nano-spectroscopy of ferroelastic domain walls in hybrid improper ferroelectric Ca₃Ti₂O₇

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