Self-assembled nanoscale ferroelectrics |
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Authors: | Marin Alexe Dietrich Hesse |
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Affiliation: | (1) Max Planck Institute of Microstructure Physics, D-06120 Halle, Germany |
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Abstract: | Multifunctional ferroelectric materials offer a wide range of useful properties, from switchable polarization that can be
applied in memory devices to piezoelectric and pyroelectric properties used in actuators, transducers and thermal sensors.
At the nanometer scale, however, material properties are expected to be different from those in bulk. Fundamental problems
such as the super-paraelectric limit, the influence of the free surface, and of interfacial and bulk defects on ferroelectric
switching, etc., arise when scaling down ferroelectrics to nanometer sizes. In order to study these size effects, fabrication
methods of high quality nanoscale ferroelectric crystals have to be developed. The present paper briefly reviews self-patterning
and self-assembly fabrication methods, including chemical routes, morphological instability of ultrathin films, microemulsion,
and self-assembly lift-off, employed up to the date to fabricate ferroelectric structures with lateral sizes in the range
of few tens of nanometers. |
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Keywords: | |
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