Analytic theory of hydrostatic stress effect on switching dynamics in ferroelectrics

作者：Loh Kok Khuan^*; Ong Lye Hock; Chew Khian Hooi

来源：Physica Scripta, 2014, 89(7): 075702.

DOI：10.1088/0031-8949/89/7/075702

• hydrostatic stress
• Landau theory
• switching dynamics

Polarization switching of ferroelectric materials is influenced by extensive variables such as electric field, temperature and stress. Currently a variety of theoretical approaches are used to gain a deeper understanding of the influence of extensive variables on the dynamic properties of ferroelectrics. In this paper a Landau-type model for second order bulk materials is used to study the extent to which hydrostatic stress affects the switching dynamic behaviours in ferroelectric material. Exact expressions for equilibrium polarization and switching time are derived analytically and then used to examine the dynamic behaviour in regimes of high electric field and hydrostatic stress. The second aspect of this work is to determine the relationship between empirical rules used to describe dynamic behaviour with the exact expressions derived from this model.

• 出版日期2014-7