Tricritical phase transitions in ferroelectrics

A. Gordon

doi:10.1016/0378-4363(83)90059-1

Tricritical phase transitions in ferroelectrics

Research output: Contribution to journal › Article › peer-review

Abstract

An one-dimensional model is suggested to simulate the tricritical phase transitions. The nonlinear excitations (solitary waves and kinks) which are the cluster walls are obtained. In the weak anharmonicity case the soft-mode behaviour takes place. It is shown that in the arbitrary anharmonicity case the soft-mode behaviour with full softening is only reached in the order-disorder regime. The domain wall energy and its thickness are calculated taking into account the nonuniform distribution of the polarization in a transition layer between the two domains with the directions of opposite signs of spontaneous polarization. The estimates of the energy and of the thickness are made for KH₂PO₄ crystals near the tricritical point. The results are compared with data which are available in literature.

Original language	English
Pages (from-to)	321-332
Number of pages	12
Journal	Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics
Volume	122
Issue number	3
DOIs	https://doi.org/10.1016/0378-4363(83)90059-1
State	Published - Nov 1983
Externally published	Yes

ASJC Scopus subject areas

General Engineering

Access to Document

10.1016/0378-4363(83)90059-1

Cite this

@article{e55f40f360864709805bda69f6b30307,

title = "Tricritical phase transitions in ferroelectrics",

abstract = "An one-dimensional model is suggested to simulate the tricritical phase transitions. The nonlinear excitations (solitary waves and kinks) which are the cluster walls are obtained. In the weak anharmonicity case the soft-mode behaviour takes place. It is shown that in the arbitrary anharmonicity case the soft-mode behaviour with full softening is only reached in the order-disorder regime. The domain wall energy and its thickness are calculated taking into account the nonuniform distribution of the polarization in a transition layer between the two domains with the directions of opposite signs of spontaneous polarization. The estimates of the energy and of the thickness are made for KH2PO4 crystals near the tricritical point. The results are compared with data which are available in literature.",

author = "A. Gordon",

year = "1983",

month = nov,

doi = "10.1016/0378-4363(83)90059-1",

language = "English",

volume = "122",

pages = "321--332",

journal = "Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics",

issn = "0378-4363",

publisher = "North-Holland Publ Co",

number = "3",

}

TY - JOUR

T1 - Tricritical phase transitions in ferroelectrics

AU - Gordon, A.

PY - 1983/11

Y1 - 1983/11

N2 - An one-dimensional model is suggested to simulate the tricritical phase transitions. The nonlinear excitations (solitary waves and kinks) which are the cluster walls are obtained. In the weak anharmonicity case the soft-mode behaviour takes place. It is shown that in the arbitrary anharmonicity case the soft-mode behaviour with full softening is only reached in the order-disorder regime. The domain wall energy and its thickness are calculated taking into account the nonuniform distribution of the polarization in a transition layer between the two domains with the directions of opposite signs of spontaneous polarization. The estimates of the energy and of the thickness are made for KH2PO4 crystals near the tricritical point. The results are compared with data which are available in literature.

AB - An one-dimensional model is suggested to simulate the tricritical phase transitions. The nonlinear excitations (solitary waves and kinks) which are the cluster walls are obtained. In the weak anharmonicity case the soft-mode behaviour takes place. It is shown that in the arbitrary anharmonicity case the soft-mode behaviour with full softening is only reached in the order-disorder regime. The domain wall energy and its thickness are calculated taking into account the nonuniform distribution of the polarization in a transition layer between the two domains with the directions of opposite signs of spontaneous polarization. The estimates of the energy and of the thickness are made for KH2PO4 crystals near the tricritical point. The results are compared with data which are available in literature.

UR - http://www.scopus.com/inward/record.url?scp=0020847855&partnerID=8YFLogxK

U2 - 10.1016/0378-4363(83)90059-1

DO - 10.1016/0378-4363(83)90059-1

M3 - Article

AN - SCOPUS:0020847855

SN - 0378-4363

VL - 122

SP - 321

EP - 332

JO - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics

JF - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics

IS - 3

ER -

Tricritical phase transitions in ferroelectrics

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this