Account for Mutual Influence of Electrical, Elastic, and Thermal Phenomena for Ferroelectric Domain Wall Modeling

Abstract

The theoretical model of the ferroelectric domain wall motion has been developed. It is demonstrated that for a proper phenomenon description it is necessary to consider the thermoelectroelasticity gradient terms. It is shown that in the linear approximation the general solution of three-dimensional problem in transversely isotropic thermoelectroelastic media can be obtained by means of five newly introduced harmonic potential functions. As an example of the proposed model applicability, the electroelastic field induced by a sphere (SPM tip) located near a plane boundary of two half-spaces is considered and described.

Keywords:

• Ferroelectric
• domain wall
• domain switching
• SPM
• approximate boundary conditions

Acknowledgment

The work was performed with support of the “Development of Scientific Potential of Higher Education 2011–2012” state program of the Ministry of Education and Science of the Russian Federation, project no2.1.2/5063.