Electrical conductivity of layered CuInP2(SxSe1−x)6 crystals. Issue 8 (4th March 2015)

• Record Type: Journal Article
• Authors: Macutkevic, Jan; Banys, Juras; Vysochanskii, Yulian
• Is Part Of: Physica status solidi. Volume 252:Issue 8(2015:Aug.)
• Page Start: 1773
• Page End: 1777
• Publication Date: 2015-03-04
• Subjects: Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201451738
• Languages: English
• ISSNs: 0370-1972

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="pssb201451738-sec-0001" sec-type="section"> <p>Investigations of the electrical conductivity of mixed CuInP₂(S<italic>_x</italic>Se_{1–<italic>x</italic>})₆ crystals were carried out in the frequency range of 20–1 MHz. Anomalies in dc conductivity were observed close to the ferroelectric phase‐transition temperature. However, these anomalies are different in selenium‐ and sulfur‐rich compounds. While in the selenium‐rich crystals group the anomaly of conductivity is sharp, in the sulfur‐rich crystals group it is less expressed. These results indicate that the copper ions contribution to the total conductivity is not vanishing down to the lowest temperatures in sulfur‐rich crystals. Moreover, in paraelectric phase the dc conductivity activation energy correlate with the pre‐exponential factor according to the Meyer–Neldel law. No conductivity anomaly was observed in mixed CuInP₂(S<italic>_x</italic>Se_{1–<italic>x</italic>})₆ crystals with the dipolar glass or relaxor behavior.</p> </sec> </abstract>