Defect-Enhanced Polarization Switching in the Improper Ferroelectric LuFeO3

Petrucio Barrozo; Didrik René Småbråten; Yun Long Tang; Bhagwati Prasad; Sahar Saremi; Rustem Ozgur; Vishal Thakare; Rachel A. Steinhardt; Megan E. Holtz; Vladimir Alexandru Stoica; Lane W. Martin; Darrel G. Schlom; Sverre Magnus Selbach; Ramamoorthy Ramesh

doi:10.1002/adma.202000508

Defect-Enhanced Polarization Switching in the Improper Ferroelectric LuFeO₃

Petrucio Barrozo, Didrik René Småbråten, Yun Long Tang, Bhagwati Prasad, Sahar Saremi, Rustem Ozgur, Vishal Thakare, Rachel A. Steinhardt, Megan E. Holtz, Vladimir Alexandru Stoica, Lane W. Martin, Darrel G. Schlom, Sverre Magnus Selbach, Ramamoorthy Ramesh

Materials Science and Engineering

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

33 Scopus citations

Abstract

Results of switching behavior of the improper ferroelectric LuFeO₃ are presented. Using a model set of films prepared under controlled chemical and growth-rate conditions, it is shown that defects can reduce the quasi-static switching voltage by up to 40% in qualitative agreement with first-principles calculations. Switching studies show that the coercive field has a stronger frequency dispersion for the improper ferroelectrics compared to a proper ferroelectric such as PbTiO₃. It is concluded that the primary structural order parameter controls the switching dynamics of such improper ferroelectrics.

Original language	English (US)
Article number	2000508
Journal	Advanced Materials
Volume	32
Issue number	23
DOIs	https://doi.org/10.1002/adma.202000508
State	Published - Jun 1 2020

All Science Journal Classification (ASJC) codes

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1002/adma.202000508

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title = "Defect-Enhanced Polarization Switching in the Improper Ferroelectric LuFeO3",

abstract = "Results of switching behavior of the improper ferroelectric LuFeO3 are presented. Using a model set of films prepared under controlled chemical and growth-rate conditions, it is shown that defects can reduce the quasi-static switching voltage by up to 40\% in qualitative agreement with first-principles calculations. Switching studies show that the coercive field has a stronger frequency dispersion for the improper ferroelectrics compared to a proper ferroelectric such as PbTiO3. It is concluded that the primary structural order parameter controls the switching dynamics of such improper ferroelectrics.",

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month = jun,

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doi = "10.1002/adma.202000508",

language = "English (US)",

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T1 - Defect-Enhanced Polarization Switching in the Improper Ferroelectric LuFeO3

AU - Barrozo, Petrucio

AU - Småbråten, Didrik René

AU - Tang, Yun Long

AU - Prasad, Bhagwati

AU - Saremi, Sahar

AU - Ozgur, Rustem

AU - Thakare, Vishal

AU - Steinhardt, Rachel A.

AU - Holtz, Megan E.

AU - Stoica, Vladimir Alexandru

AU - Martin, Lane W.

AU - Schlom, Darrel G.

AU - Selbach, Sverre Magnus

AU - Ramesh, Ramamoorthy

PY - 2020/6/1

Y1 - 2020/6/1

N2 - Results of switching behavior of the improper ferroelectric LuFeO3 are presented. Using a model set of films prepared under controlled chemical and growth-rate conditions, it is shown that defects can reduce the quasi-static switching voltage by up to 40% in qualitative agreement with first-principles calculations. Switching studies show that the coercive field has a stronger frequency dispersion for the improper ferroelectrics compared to a proper ferroelectric such as PbTiO3. It is concluded that the primary structural order parameter controls the switching dynamics of such improper ferroelectrics.

AB - Results of switching behavior of the improper ferroelectric LuFeO3 are presented. Using a model set of films prepared under controlled chemical and growth-rate conditions, it is shown that defects can reduce the quasi-static switching voltage by up to 40% in qualitative agreement with first-principles calculations. Switching studies show that the coercive field has a stronger frequency dispersion for the improper ferroelectrics compared to a proper ferroelectric such as PbTiO3. It is concluded that the primary structural order parameter controls the switching dynamics of such improper ferroelectrics.

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Defect-Enhanced Polarization Switching in the Improper Ferroelectric LuFeO₃

Abstract

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