Title :
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
Abstract :
The dielectric properties of Mn2P2S6 and Cu0.52Mn1.74P2S6 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 EA/k= 0.82 eV (Mn2P2S6) and EA/k= 0.81 eV (Cu0.52Mn1.74P2S6). 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; Cu0.52Mn1.74P2S6; 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;
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
DOI :
10.1109/ISAF.2012.6297776
