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Theory of Switching in Bulk First‐Order Ferroelectric Materials
Author(s) -
Tan EngKiang,
Osman J.,
Tilley D.R.
Publication year - 2001
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200112)228:3<765::aid-pssb765>3.0.co;2-x
Subject(s) - ferroelectricity , hysteresis , dimensionless quantity , condensed matter physics , dielectric , coercivity , field (mathematics) , switching time , physics , materials science , statistical physics , mathematics , mechanics , quantum mechanics , optoelectronics , pure mathematics
A detailed account of switching and related properties of bulk first‐order ferroelectric materials is given. The ferroelectric is described by the Landau‐Devonshire free energy and all the results are given in terms of dimensionless variables so that they are generally applicable. In the first part of the paper the static properties are discussed. The forms of the dielectric hysteresis loop in various temperature ranges are presented and analytic results are derived for the two coercive fields that are needed for a description of the hysteresis. Switching is described by means of the Landau‐Khalatnikov dynamical equation, and analytic expressions for the maximum and minimum switching currents are derived. The equation is solved numerically to find switching characteristics for an applied step field and the hysteretic response to a sinusoidal field.