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Название: | Ferroelectricity in (PbySn1−y)2P2S6 mixed crystals and random field BEG model |
Авторы: | Rushchanskii, K. Z. Bilanych, R. M. Molnar, Alexander Yevych, R. M. Kohutych, Anton Perechinskii, S. I. Samulionis, V. Banys, J. Vysochanskii, Yulian |
Ключевые слова: | Blume–Emery–Griffiths model, ferroelectrics, phase diagrams, tricritical point |
Дата публикации: | фев-2016 |
Издательство: | Wiley-VCH |
Библиографическое описание: | Ferroelectricity in (PbySn1−y)2P2S6 mixed crystals and random field BEG model / K. Z. Rushchanskii, R. M. Bilanych, A. A. Molnar, R. M. Yevych, A. A. Kohutych, S. I. Perechinskii, V. Samulionis, J. Banys, and Y. M. Vysochanskii // Physica Status Solidi B253, - 2016. - No.2, - pp.384–391/ DOI 10.1002/pssb.201552138 |
Краткий осмотр (реферат): | In Sn2P2S6 ferroelectric under compression, the second-order phase transition line is observed down to the tricritical point as the transition temperature decreases to 250 K. A tricriticality at a similar temperature is also revealed in the mixed crystals on S→Se substitution. For the mixed crystals with Sn→Pb substitution, ultrasound, hypersound, and low-frequency dielectric studies also show heterophase features appearing on decrease of the ferroelectric transition temperature below a so-called “waterline temperature” near 250 K. Such behavior agrees with the Blume–Emery–Griffiths (BEG) model appropriate for the ferroelectric system under investigation with a three-well local potential for the order parameter fluctuations. The BEG model modified by the random-field phase diagram in the vicinity of the tricritical point qualitatively explains the influence of the cationic substitution on the (PbySn1−y)2P2S6 ferroelectric properties. |
Описание: | In Sn2P2S6 ferroelectric under compression, the second-order phase transition line is observed down to the tricritical point as the transition temperature decreases to 250 K. A tricriticality at a similar temperature is also revealed in the mixed crystals on S→Se substitution. For the mixed crystals with Sn→Pb substitution, ultrasound, hypersound, and low-frequency dielectric studies also show heterophase features appearing on decrease of the ferroelectric transition temperature below a so-called “waterline temperature” near 250 K. Such behavior agrees with the Blume–Emery–Griffiths (BEG) model appropriate for the ferroelectric system under investigation with a three-well local potential for the order parameter fluctuations. The BEG model modified by the random-field phase diagram in the vicinity of the tricritical point qualitatively explains the influence of the cationic substitution on the (PbySn1−y)2P2S6 ferroelectric properties. |
Тип: | Text |
Тип публикации: | Стаття |
URI (Унифицированный идентификатор ресурса): | https://dspace.uzhnu.edu.ua/jspui/handle/lib/60468 |
Располагается в коллекциях: | Наукові публікації кафедри фізики напівпровідників |
Файлы этого ресурса:
Файл | Описание | Размер | Формат | |
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2016_pssb_201552138p.pdf | article | 2.2 MB | Adobe PDF | Просмотреть/Открыть |
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