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DESIGN OPTIMIZATION OF A FERROELECTRIC NANO-ACTUATOR USING PHASE-FIELD MODELING

Published online by Cambridge University Press:  09 June 2014

Ananya Renuka Balakrishna and
John E. Huber
Ananya Renuka Balakrishna
Affiliation:
Department of Engineering Science, Parks Road, University of Oxford, OX1 3PJ, U.K.
John E. Huber
Affiliation:
Department of Engineering Science, Parks Road, University of Oxford, OX1 3PJ, U.K.
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Abstract

A ferroelectric crystal with charge-free surface conditions contains polarized domains which can form a flux closure with zero net polarization. In the presence of an external electric field, the flux closure in a two-dimensional continuum reorients its spontaneous polarization to align with the field. Based on this concept of ferroelectric switching coupled with mechanical straining, we demonstrate the working principle of a ferroelectric nano-actuator. The behavior of the actuator is explored under the action of electro-mechanical loading and its mechanism is simulated with a 2D phase-field model. The design of nano-actuator is modified to achieve greater actuation displacements by bending a thin device.

Keywords

ferroelectricactuatorsimulation

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Type
Articles
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MRS Online Proceedings Library (OPL) , Volume 1674: Symposium J – Physics of Oxide Thin Films and Heterostructures , 2014, mrss14-1674-j03-03
Copyright
Copyright © Materials Research Society 2014 

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References

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