Theory of dielectric susceptibility in an applied electric field near the incommensurate-to-commensurate phase transition in K2SeO4-type crystals

Autor:	V Dvodrak, J Holakovsky
Rok vydání:	1988
Předmět:	Physics Phase transition Condensed matter physics Electric susceptibility General Engineering Phase (waves) General Physics and Astronomy Soliton (optics) Dielectric Condensed Matter Physics Ferroelectricity Polarization density Electric field Condensed Matter::Strongly Correlated Electrons
Zdroj:	Journal of Physics C: Solid State Physics. 21:5449-5454
ISSN:	0022-3719
DOI:	10.1088/0022-3719/21/31/015
Popis:	A phenomenological theory of the dielectric susceptibility in the biasing electric field near the incommensurate-to-commensurate improper ferroelectric phase transition is presented. The incommensurate phase is treated in the soliton limit, i.e., as a periodic sequence of domains with opposite polarisation separated by domain walls of negative energies. Experimental results can be explained quantitatively on the assumption that in the AC electric field used for the measurement the number of domain walls remain constant since the processes leading to its change are much slower.
Databáze:	OpenAIRE
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