Dielectric and Dilatometric Properties of NH(CH_3)_3CuCl_3·2H_2O Low Dimensional Ferroics

• Authors: Yu. Korchak , V. Kapustianik , A. Batiuk , I. Girnyk , Z. Czapla , S. Dacko
• Languages of publication: EN

Abstracts

EN

On the basis of dilatometric and dielectric investigations of NH(CH_3)_3CuCl_3·2H_2O crystals the earlier unknown phase transition with considerable temperature hysteresis was found at T_1^c=198 K and T_1^h=223 K, respectively, in cooling and heating runs. Existence of the characteristic dielectric dispersion was revealed within the high-temperature phase. It corresponds to the single dielectric relaxator below 250 K as well as to co-existence of two relaxators above this temperature. The determined values of the activation energy and relaxation time are characteristic of the co-operative reorientation of the trimethylammonium cation (high-frequency relaxator) whereas the combined reorientation motions of the CuCl_2·2H_2O chains would be responsible for the low-frequency relaxation process. It was found that the above mentioned quasi-Debye type processes are involved into the mechanisms of the protonic conductivity.

Keywords

EN

64.70.-p

Discipline

• 64.70.-p: Specific phase transitions

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2004
• Volume: 106
• Issue: 1
• Pages: 39-49

Dates

published

2004-07

received

2004-05-10

Contributors

author

Yu. Korchak

• Ferroics Physics Laboratory, Electronics Department, Lviv I. Franko National University, Tarnavskogo st. 107, 79017 Lviv, Ukraine

author

V. Kapustianik

• Ferroics Physics Laboratory, Electronics Department, Lviv I. Franko National University, Tarnavskogo st. 107, 79017 Lviv, Ukraine

author

A. Batiuk

• Ferroics Physics Laboratory, Electronics Department, Lviv I. Franko National University, Tarnavskogo st. 107, 79017 Lviv, Ukraine

author

I. Girnyk

• Institute of Physical Optics, Dragomanova st. 23, 79005 Lviv, Ukraine

author

Z. Czapla

• Institute of Experimental Physics, University of Wrocław, pl. M. Borna 9, 50-204 Wrocław, Poland

author

S. Dacko

• Institute of Experimental Physics, University of Wrocław, pl. M. Borna 9, 50-204 Wrocław, Poland

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Identifiers

DOI

10.12693/APhysPolA.106.39