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A Study on Effective Charge in the Dipole Theory of Ferroelectrics
Author(s) -
Pak K. N.,
Yokoyama S.,
Kinase W.
Publication year - 1974
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/pssb.2220630228
Subject(s) - dipole , ferroelectricity , charge (physics) , condensed matter physics , dielectric , phase transition , point particle , range (aeronautics) , physics , phase (matter) , materials science , quantum mechanics , composite material
The effective charge used in dipole theory of ferroelectrics has been investigated theoretically. Particular emphasis is placed on its temperature dependence. Employing the concept of the statistical theory of ferroelectricity, it is shown that in the dipole theory the effective charge corresponds to the temperature, and the relation between them has been established in a statistical way within the framework of dipole theory. The temperature dependence of the effective charge has been determined in detail by carrying out the numerical calculations and the results obtained have been discussed. As a result, it is found that in the ferroelectric phase the effective charge depends strongly on temperature as the long‐range dipole interaction becomes large and this inclination is more remarkable in the vicinity of the transition point, whereas in the paraelectric phase the effective charge is nearly independent of temperature over a wide range of it, except near the transition point.