Thermodynamics and dielectric properties of the NH₄H₂PO₄ type antiferroelectrics
Within the framework of the proton model we study thermodynamic and static dielectric properties of the ADP type antiferroelectrics with taking into account the tunnelling effects of protons on hydrogen bonds. In the fourparticle cluster approximation for the short-range interactions and in the...
Збережено в:
| Дата: | 2002 |
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| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики конденсованих систем НАН України
2002
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| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/120671 |
| Теги: |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Thermodynamics and dielectric properties of the NH₄H₂PO₄ type antiferroelectrics / R.R. Levitskii, B.M. Lisnii, O.R. Baran // Condensed Matter Physics. — 2002. — Т. 5, № 3(31). — С. 553-577. — Бібліогр.: 49 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | Within the framework of the proton model we study thermodynamic and
static dielectric properties of the ADP type antiferroelectrics with taking into
account the tunnelling effects of protons on hydrogen bonds. In the fourparticle
cluster approximation for the short-range interactions and in the
mean field approximation for the long-range interactions we calculate the
free energy, entropy, and components of static dielectric susceptibility of the
crystals. We also get the system of equations for the sublattice proton order
parameter and an equation for the phase transition temperature. We find
the values of the theory parameters for the NH₄H₂PO₄ and NH₄H₂AsO₄
crystals and get a good agreement between the theoretical results and the
corresponding experimental data for the temperature dependences of the
spontaneous sublattice polarization, proton specific heat, longitudinal and
transverse static dielectric permittivities of the crystals. |
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