Dimensional effiects on ferroelectrics: Ultra-thin single crystals, nanotubes, nano-rods, and nano-ribbons.

Scott, J. F. (2005) Dimensional effiects on ferroelectrics: Ultra-thin single crystals, nanotubes, nano-rods, and nano-ribbons. Ferroelectrics, 316. pp. 13-21. DOI 10.1080/00150190590963084

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Abstract

A discussion is presented of nano-scale ferroelectric devices. Nano-ribbons exhibit an “extra” relaxation process with an 0.20 ± 0.01 eV activation energy attributed to OH hydroxyl ion reorientation. Barium titanate single crystals down to 65-nm are characterized by bulk properties, and broadening of dielectric peaks ε(T) versus temperature attributed by others to intrinsic depolarization effects are instead shown to be extrinsic, due to oxygen vacancy gradients, in accord with the recent models of Catalan et al. and of Bratkovsky and Levanyuk. Similar transitions in barium strontium titanate (BST) thin films are shown to be reentrant (only upon warming from T < 50 K) and limited by kinetics, not thermodynamic equilibria.

Item Type: Article
Uncontrolled Keywords: 2005 AREP 2005 P IA49
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Journal or Publication Title: Ferroelectrics
Volume: 316
Page Range: pp. 13-21
Identification Number: 10.1080/00150190590963084
Depositing User: Sarah Humbert
Date Deposited: 18 Aug 2010 15:38
Last Modified: 23 Jul 2013 09:59
URI: http://eprints.esc.cam.ac.uk/id/eprint/1815

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