A focused ion beam microscope has been used to mill rectangular “picture-frame” shapes from single crystal barium titanate. The lengths of the sides of the picture frames were of the order of , while the side width and thickness dimensions were of the order of . Such aspect ratios meant that each of the frame sides approximates to a column with rectangular cross section. Scanning transmission electron microsopy was used to characterize the ferroelectric domain configurations associated with these nanocolumns. It was found that conventional stripe domain patterns occurred in all cases, down to columnar cross-section sizes of the order of . Despite the geometry of the columns rendering the ferroelectric as shape constrained in two dimensions, the domain periodicity was only noticeably sensitive to variations in the magnitude of one of those dimensions. Such observations were rationalized using arguments based on those used by Kittel [Phys. Rev. 70, 965 (1946)] and Mitsui and Furuichi [Phys. Rev. 90, 193 (1953)] for predicting the equilibrium domain periodicities in macroscopic slabs of ferroic material.
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20 November 2006
Research Article|
November 21 2006
Ferroelectric domain periodicities in nanocolumns of single crystal barium titanate
A. Schilling;
A. Schilling
Centre for Nanostructured Media, IRCEP,
Queen’s University Belfast
, Belfast BT7 1NN, United Kingdom and School of Mathematics and Physics, Queen’s University Belfast
, Belfast BT7 1NN, United Kingdom
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R. M. Bowman;
R. M. Bowman
Centre for Nanostructured Media, IRCEP,
Queen’s University Belfast
, Belfast BT7 1NN, United Kingdom and School of Mathematics and Physics, Queen’s University Belfast
, Belfast BT7 1NN, United Kingdom
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J. M. Gregg;
J. M. Gregg
a)
Centre for Nanostructured Media, IRCEP,
Queen’s University Belfast
, Belfast BT7 1NN, United Kingdom and School of Mathematics and Physics, Queen’s University Belfast
, Belfast BT7 1NN, United Kingdom
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G. Catalan;
G. Catalan
Department of Earth Sciences,
University of Cambridge
, Cambridge CB2 3EQ, United Kingdom
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J. F. Scott
J. F. Scott
Department of Earth Sciences,
University of Cambridge
, Cambridge CB2 3EQ, United Kingdom
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a)
Author to whom correspondence should be addressed; electronic mail: m.gregg@qub.ac.uk
Appl. Phys. Lett. 89, 212902 (2006)
Article history
Received:
August 11 2006
Accepted:
October 08 2006
Citation
A. Schilling, R. M. Bowman, J. M. Gregg, G. Catalan, J. F. Scott; Ferroelectric domain periodicities in nanocolumns of single crystal barium titanate. Appl. Phys. Lett. 20 November 2006; 89 (21): 212902. https://doi.org/10.1063/1.2393145
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