Research Papers in Physics and Astronomy


Date of this Version

January 2000


Published by American Physical Society. Physical Review Letters 84, 175-8 (2000). Copyright © 2000 American Physical Society. Permission to use.


The Landau-Ginzburg theory of ferroelectricity predicts the intrinsic coercive field for polarization reversal, but the observed extrinsic coercive field is always much smaller as a result of nucleation, dynamic processes not covered by the static theory. We have realized the intrinsic coercive field for the first time, in two-dimensional Langmuir-Blodgett polymer films as thin as 1 nm. The measured coercive field is in good agreement with the theoretical intrinsic value, exhibits the expected dependence on temperature, and does not depend on thickness below 15 nm.

Included in

Physics Commons