Field sums for extended dipoles in ferroelectric polymers
- 1 February 1985
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 57 (3) , 897-901
- https://doi.org/10.1063/1.334689
Abstract
A previously described method for calculating the Lorentz factor L for orthorhombic polar crystals is modified to allow discussion of dipoles of finite size. In this approach, the field due to a lattice of point charges ±q separated by a distance d is calculated. The Lorentz factor, which relates the field at a lattice site to the macroscopic polarization, is found as a function of the dipole length d, and is seen to vary appreciably with changes in the separation between the charges. Assumption of a value of 1/3 for L can thus lead to significant errors in determining the self-consistent polarization of crystals consisting of polarizable molecules.This publication has 4 references indexed in Scilit:
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- Lattice SumsPublished by Elsevier ,1980
- Static-lattice theory of crystalline HCN: I. Effective dipole potentialChemical Physics, 1976
- Dipole fields and electric-field gradients in their dependence on the macroscopic and microscopic crystal parameters for orthorhombic and hexagonal lattices. IPhysica, 1971