Conductivity investigations of layered Mn2P2S6 and Cu0.52Mn1.74P2S6 crystals

Author

Dziaugys, A. ; Banys, J. ; Vysochanskii, Yu.

Author_Institution

Dept. of Radiophys., Vilnius Univ., Vilnius, Lithuania

fYear

2012

fDate

9-13 July 2012

Firstpage

1

Lastpage

3

Abstract

The dielectric properties of Mn₂P₂S₆ and Cu_0.52Mn_1.74P₂S₆ crystals were investigated in broad frequency (20 Hz-1 MHz) and temperature range (100 K-430 K). No anomaly in temperature dependence of complex dielectric permittivity indicating the polar phase transition can be detected in measured temperature range. The dielectric properties of presented crystals are mainly caused by high conductivity. The frequency spectra of conductivity obey the Almond-West power law. The activation energy of conductivity was found to be E_A/k= 0.82 eV (Mn₂P₂S₆) and E_A/k= 0.81 eV (Cu_0.52Mn_1.74P₂S₆). A suggestion is given that the electric conductivity in these crystals can be interpreted by electronic mechanism.

Keywords

copper compounds; hopping conduction; manganese compounds; permittivity; Almond-West power law; Cu_0.52Mn_1.74P₂S₆; Mn₂P₂S₆; activation energy; dielectric permittivity; dielectric properties; electric conductivity; electronic mechanism; frequency 20 Hz to 1 MHz; frequency spectra; temperature 100 K to 430 K; Atomic layer deposition; Conductivity; Crystals; Dielectrics; Permittivity; Temperature dependence; Temperature measurement; Antiferromagnetic phase transition; Electric modulus; Electronic conductivity; Relaxation;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics held jointly with 2012 European Conference on the Applications of Polar Dielectrics and 2012 International Symp Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials (ISAF/ECAPD/PFM), 2012 Intl Symp

Conference_Location

Aveiro

Print_ISBN

978-1-4673-2668-1

Type

conf

DOI

10.1109/ISAF.2012.6297776

Filename

6297776