Structural, magnetic, and ferroelectric properties of T-like cobalt-doped BiFeO3 thin films

Structural, magnetic, and ferroelectric properties of T-like cobalt-doped BiFeO3 thin films

We present a comprehensive study of the physical properties of epitaxial cobalt-doped BiFeO3 films ∼50 nm thick grown on (001) LaAlO3 substrates. X-ray diffraction and magnetic characterization demonstrate high quality purely tetragonal-like (T′) phase films with no parasitic impurities. Remarkably,...

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Main Authors: T. Young, P. Sharma, D. H. Kim, Thai Duy Ha, Jenh-Yih Juang, Y.-H. Chu, J. Seidel, V. Nagarajan, S. Yasui, M. Itoh, D. Sando
Format: Article
Language:English
Published: AIP Publishing LLC 2018-02-01
Series:APL Materials
Online Access:http://dx.doi.org/10.1063/1.5011783
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spelling doaj-6bfb517b9920424e9b834892d30dfa292020-11-24T21:37:56ZengAIP Publishing LLCAPL Materials2166-532X2018-02-0162026102026102-710.1063/1.5011783002802APMStructural, magnetic, and ferroelectric properties of T-like cobalt-doped BiFeO3 thin filmsT. Young0P. Sharma1D. H. Kim2Thai Duy Ha3Jenh-Yih Juang4Y.-H. Chu5J. Seidel6V. Nagarajan7S. Yasui8M. Itoh9D. Sando10School of Materials Science and Engineering, UNSW Sydney, High Street, Kensington, NSW 2052, AustraliaSchool of Materials Science and Engineering, UNSW Sydney, High Street, Kensington, NSW 2052, AustraliaSchool of Materials Science and Engineering, UNSW Sydney, High Street, Kensington, NSW 2052, AustraliaDepartment of Electrophysics, National Chiao Tung University, Hsinchu 30010, TaiwanDepartment of Electrophysics, National Chiao Tung University, Hsinchu 30010, TaiwanDepartment of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, TaiwanSchool of Materials Science and Engineering, UNSW Sydney, High Street, Kensington, NSW 2052, AustraliaSchool of Materials Science and Engineering, UNSW Sydney, High Street, Kensington, NSW 2052, AustraliaLaboratory for Materials and Structures, Tokyo Institute of Technology, 4259-J2-19, Nagatsutacho, Midori-ku, Yokohama 226-8503, JapanLaboratory for Materials and Structures, Tokyo Institute of Technology, 4259-J2-19, Nagatsutacho, Midori-ku, Yokohama 226-8503, JapanSchool of Materials Science and Engineering, UNSW Sydney, High Street, Kensington, NSW 2052, AustraliaWe present a comprehensive study of the physical properties of epitaxial cobalt-doped BiFeO3 films ∼50 nm thick grown on (001) LaAlO3 substrates. X-ray diffraction and magnetic characterization demonstrate high quality purely tetragonal-like (T′) phase films with no parasitic impurities. Remarkably, the step-and-terrace film surface morphology can be fully recovered following a local electric-field-induced rhombohedral-like to T′ phase transformation. Local switching spectroscopy experiments confirm the ferroelectric switching to follow previously reported transition pathways. Critically, we show unequivocal evidence for conduction at domain walls between polarization variants in T′-like BFO, making this material system an attractive candidate for domain wall-based nanoelectronics.http://dx.doi.org/10.1063/1.5011783
collection DOAJ
language English
format Article
sources DOAJ
author T. Young
P. Sharma
D. H. Kim
Thai Duy Ha
Jenh-Yih Juang
Y.-H. Chu
J. Seidel
V. Nagarajan
S. Yasui
M. Itoh
D. Sando
spellingShingle T. Young
P. Sharma
D. H. Kim
Thai Duy Ha
Jenh-Yih Juang
Y.-H. Chu
J. Seidel
V. Nagarajan
S. Yasui
M. Itoh
D. Sando
Structural, magnetic, and ferroelectric properties of T-like cobalt-doped BiFeO3 thin films
APL Materials
author_facet T. Young
P. Sharma
D. H. Kim
Thai Duy Ha
Jenh-Yih Juang
Y.-H. Chu
J. Seidel
V. Nagarajan
S. Yasui
M. Itoh
D. Sando
author_sort T. Young
title Structural, magnetic, and ferroelectric properties of T-like cobalt-doped BiFeO3 thin films
title_short Structural, magnetic, and ferroelectric properties of T-like cobalt-doped BiFeO3 thin films
title_full Structural, magnetic, and ferroelectric properties of T-like cobalt-doped BiFeO3 thin films
title_fullStr Structural, magnetic, and ferroelectric properties of T-like cobalt-doped BiFeO3 thin films
title_full_unstemmed Structural, magnetic, and ferroelectric properties of T-like cobalt-doped BiFeO3 thin films
title_sort structural, magnetic, and ferroelectric properties of t-like cobalt-doped bifeo3 thin films
publisher AIP Publishing LLC
series APL Materials
issn 2166-532X
publishDate 2018-02-01
description We present a comprehensive study of the physical properties of epitaxial cobalt-doped BiFeO3 films ∼50 nm thick grown on (001) LaAlO3 substrates. X-ray diffraction and magnetic characterization demonstrate high quality purely tetragonal-like (T′) phase films with no parasitic impurities. Remarkably, the step-and-terrace film surface morphology can be fully recovered following a local electric-field-induced rhombohedral-like to T′ phase transformation. Local switching spectroscopy experiments confirm the ferroelectric switching to follow previously reported transition pathways. Critically, we show unequivocal evidence for conduction at domain walls between polarization variants in T′-like BFO, making this material system an attractive candidate for domain wall-based nanoelectronics.
url http://dx.doi.org/10.1063/1.5011783
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