Revealing the Interplay of Structural Phase Transitions and Ferroelectric Switching in Mixed Phase BiFeO3

Aaron B. Naden; David Edwards; Sabine M. Neumayer; Joseph G.M. Guy; Brian J. Rodriguez; Nazanin Bassiri-Gharb; Amit Kumar

doi:10.1002/admi.201801019

Revealing the Interplay of Structural Phase Transitions and Ferroelectric Switching in Mixed Phase BiFeO₃

Aaron B. Naden, David Edwards, Sabine M. Neumayer, Joseph G.M. Guy, Brian J. Rodriguez, Nazanin Bassiri-Gharb, Amit Kumar

Functional Atomic Force Microscopy Group

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Epitaxially strained BiFeO₃ thin films with coexisting tetragonal- and rhombohedral-like phases exhibit a range of intriguing functional properties, often strongly related to the unique microstructure of the film. Here enhancements in electromechanical response are reported during simultaneous nanoscale application of electric field and localized stress. These enhancements manifest in the form of peaks, or humps, in the piezoresponse hysteresis loops obtained under a select polarity of applied electric field, corresponding nominally to a downward polarization. Using a variation of band excitation piezoresponse force spectroscopy to collect electromechanical hysteresis loops and to simultaneously monitor the elastic behavior during switching, a comprehensive picture of the complex interplay of ferroelastic structural transitions and ferroelectric switching and its impact on the overall functional response are developed. Such an understanding is a crucial step toward realizing practical electronic devices, such as pressure sensors, incorporating this promising material.

Original language	English
Article number	1801019
Journal	Advanced Materials Interfaces
Volume	5
Issue number	21
DOIs	https://doi.org/10.1002/admi.201801019
State	Published - Nov 9 2018

Funding

A.B.N. and A.K. gratefully acknowledge support by Department of Education and Learning, Northern Ireland through the US-Ireland R&D partnership Grant No. USI-082 and funding support from the Engineering and Physical Sciences Research Council (EPSRC) through Contract EP/N018389/01. S.M.N. and B.J.R. acknowledge support from Science Foundation Ireland (14/US/I3113). N.B.-G. gratefully acknowledges support from US National Science Foundation through grant CMMI-1537262 and DMR-1255379. The authors are grateful to Dr. K. M. Holsgrove and Dr. M. Arredondo (School of Mathematics and Physics, Queen's University Belfast) for provision of the STEM data in the Supporting Information. A. K. also acknowledges financial support from the Queen's University Belfast Central Research Infrastructure Fund (CRIF). A.B.N. and A.K. gratefully acknowledge support by Department of Education and Learning, Northern Ireland through the US-Ireland R&D partnership Grant No. USI-082 and funding support from the Engineering and Physical Sciences Research Council (EPSRC) through Contract EP/N018389/01. S.M.N. and B.J.R. acknowledge support from Science Foundation Ireland (14/US/I3113). N.B.-G. gratefully acknowledges support from US National Science Foundation through grant CMMI-1537262 and DMR-1255379. The authors are grateful to Dr. K. M. Holsgrove and Dr. M. Arredondo (School of Mathematics and Physics, Queen’s University Belfast) for provision of the STEM data in the Supporting Information. A. K. also acknowledges financial support from the Queen’s University Belfast Central Research Infrastructure Fund (CRIF).

Funders	Funder number
CRIF
Department of Education and Learning
Queen's University Belfast Central Research Infrastructure Fund
Queen’s University Belfast Central Research Infrastructure Fund
National Science Foundation	CMMI-1537262, DMR-1255379
Engineering and Physical Sciences Research Council	1786464, EP/N018389/1, EP/N018389/01
Arts Council of Northern Ireland	USI-082
Science Foundation Ireland	14/US/I3113

Keywords

mixed-phase ferroelectric
nanoscale stress
phase transitions
piezoresponse force microscopy
polarization rotation

Access to Document

10.1002/admi.201801019

Cite this

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title = "Revealing the Interplay of Structural Phase Transitions and Ferroelectric Switching in Mixed Phase BiFeO3 ",

abstract = "Epitaxially strained BiFeO3 thin films with coexisting tetragonal- and rhombohedral-like phases exhibit a range of intriguing functional properties, often strongly related to the unique microstructure of the film. Here enhancements in electromechanical response are reported during simultaneous nanoscale application of electric field and localized stress. These enhancements manifest in the form of peaks, or humps, in the piezoresponse hysteresis loops obtained under a select polarity of applied electric field, corresponding nominally to a downward polarization. Using a variation of band excitation piezoresponse force spectroscopy to collect electromechanical hysteresis loops and to simultaneously monitor the elastic behavior during switching, a comprehensive picture of the complex interplay of ferroelastic structural transitions and ferroelectric switching and its impact on the overall functional response are developed. Such an understanding is a crucial step toward realizing practical electronic devices, such as pressure sensors, incorporating this promising material.",

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AU - Bassiri-Gharb, Nazanin

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AB - Epitaxially strained BiFeO3 thin films with coexisting tetragonal- and rhombohedral-like phases exhibit a range of intriguing functional properties, often strongly related to the unique microstructure of the film. Here enhancements in electromechanical response are reported during simultaneous nanoscale application of electric field and localized stress. These enhancements manifest in the form of peaks, or humps, in the piezoresponse hysteresis loops obtained under a select polarity of applied electric field, corresponding nominally to a downward polarization. Using a variation of band excitation piezoresponse force spectroscopy to collect electromechanical hysteresis loops and to simultaneously monitor the elastic behavior during switching, a comprehensive picture of the complex interplay of ferroelastic structural transitions and ferroelectric switching and its impact on the overall functional response are developed. Such an understanding is a crucial step toward realizing practical electronic devices, such as pressure sensors, incorporating this promising material.

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