Сonfigurational Entropy Application to Explain Polar Crystals Peculiarities

Authors

DOI:

https://doi.org/10.15407/ujpe71.10.779

Keywords:

polar crystals, piezoelectrics, pyroelectrics, ferroelectrics, electronegativity, configurational entropy, relaxor ferroelectrics

Abstract

Polar crystals possess a unique ability to acquire electrical polarization by means of nonelectrical influences: mechanical, thermal, optical, and other impacts. Polar crystals are also capable of mutual transformation of mechanical, thermal and electrical energy, demonstrating piezoelectric and pyroelectric effects (both direct and inverse). The electrical parameters of polar crystals strongly depend on the mechanical and thermal conditions of the experiment and, conversely, their thermal and elastic properties are determined by electrical conditions. In this paper, the unique properties of polar crystals are analyzed using experimental data and thermodynamics. In particular, the intrinsic polarity of crystals is explained by the difference in electronegativity of neighboring ions in the crystal lattice, and by self-organization of dynamic polar clusters that is explained by the concept of configurational entropy. These considerations were illustrated by some examples: the influence of external conditions on the properties of polar crystals, the increase in volume of the polar state, and the high permittivity of relaxor ferroelectrics.

Author Biography

  • Yu.M. Poplavko, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”

    Professor, Doctor of Physics and Mathematics Sciences, Professor of the Department of Micro-electronics of the “Igor Sikorsky Kyiv Polytechnic Institute”. Author of about 500 scientific publications. His main research interests are deve-lopments in the field of microelectronics, nanomaterials and nanotechnologies.

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Published

2026-10-02

Issue

Vol. 71 No. 10 (2026)

Section

Semiconductors and dielectrics

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How to Cite

Сonfigurational Entropy Application to Explain Polar Crystals Peculiarities. (2026). Ukrainian Journal of Physics, 71(10), 779. https://doi.org/10.15407/ujpe71.10.779

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