Optical and electric manifestations of incommensurate phase in NH₄HSeO₄ crystals

• Published in: Condensed Matter Physics
• Date: 1999
• Main Authors: Andriyevsky, B.V., Czapla, Z., Dacko, S., Myshchyshyn, O.Ya.
• Format: Article
• Language: English
• Published: Інститут фізики конденсованих систем НАН України 1999
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/121016
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Optical and electric manifestations of incommensurate phase in NH₄HSeO₄ crystals / B.V. Andriyevsky, Z. Czapla, S. Dacko, O.Ya. Myshchyshyn // Condensed Matter Physics. — 1999. — Т. 2, № 4(20). — С. 685-691. — Бібліогр.: 13 назв. — англ.

Temperature dependences of the optical path difference by the variable
 part of refractive index D = (n − 1)l and the components ε′ and ε′′ of complex dielectric permittivity for NH₄HSeO₄ single crystal are studied in the
 temperature range of 220–300 K. Anomalous behaviour of these...