Journal
Article title
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Abstracts
Dielectric and birefringent properties of [N(C_{2}H_{5})_{4}]_{2}ZnBr_{4} and [N(C_{2}H_{5})_{4}]_{2}CdBr_{4} crystals were investigated. It has been ascertained that two phase transitions manifest themselves in the temperature dependencies є(T) for [N(C_{2}H_{5})_{4}]_{2}CdBr_{4} crystal - a second-order transition at T_{1} = 311 K and a first-order one - at T_{2} = 39 K (∆T_{2} = 11 K). Besides two earlier known phase transitions in [N(C_{2}H_{5})_{4}]_{2}ZnBr_{4} at T_{1} = 350 K and T^{cool}_{2} = 282.8 K (∆T_{2} ≈ 2.3 K), the additional one was found at T*_{2} = 287.0 K, both on the cooling and heating runs. On the basis of the data about the peculiarities of dielectric and optical properties in the vicinity of T_{2} one can made the conclusion about the ferroelectric character of the phase, situated between T*_{2} and T^{cool}_{2}.
Discipline
- 78.20.Fm: Birefringence
- 77.22.-d: Dielectric properties of solids and liquids(for dielectric properties of tissues and organs, see 87.19.rf)
- 77.22.Ch: Permittivity (dielectric function)(for low-permittivity dielectric films, see 77.55.Bh; for high-permittivity gate dielectric films, 77.55.D-)
- 64.70.-p: Specific phase transitions
Journal
Year
Volume
Issue
Pages
777-784
Physical description
Dates
published
1993-06
received
1992-04-15
(unknown)
1993-03-16
Contributors
author
- Lviv State University, Lomonosov Str. 8, 290005 Lviv, Ukraine
author
- Lviv State University, Lomonosov Str. 8, 290005 Lviv, Ukraine
author
- Lviv State University, Lomonosov Str. 8, 290005 Lviv, Ukraine
author
- Lviv State University, Lomonosov Str. 8, 290005 Lviv, Ukraine
author
- Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17/19, 60-179 Poznań, Poland
author
- Institute of Applied Physics, Acad. Sci. Moldova, Kishineu, Moldova
author
- Institute of Applied Physics, Acad. Sci. Moldova, Kishineu, Moldova
author
- Institute of Applied Physics, Acad. Sci. Moldova, Kishineu, Moldova
References
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv83z606kz