Size Effect in Ferroelectric Long Cylinders

Department of Physics, Shandong University, Jinan 250100¹Department of Physics, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, England

Published Date: January 31, 1995

Abstract

The Curie temperature and polarization in a ferroelectric cylinder with infinite length have been examined using Landau free energy expansion. The Curie temperature and polarization decrease with decreasing cylinder diameter for the positive extrapolation length, and reach zero at the critical size. For negative extrapolation length, both Curie temperature and polarization increase with decreasing cylinder diameter.