Journal Article

FZJ-2015-07780

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ferroelectricity in (PbySn1−y)2P2S6 mixed crystals and random field BEG model

Rushchanskii, K. (Corresponding author)FZJ* ; Bilanych, R. M. ; Molnar, A. A. ; Yevych, R. M. ; Kohutych, A. A. ; Perechinskii, S. I. ; Samulionis, V. ; Banys, J. ; Vysochanskii, Y. M.

2016
Wiley-VCH70889 Weinheim

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Please use a persistent id in citations: doi:10.1002/pssb.201552138

Abstract: In Sninline imagePinline imageSinline image ferroelectric under compression, the second-order phase transition line is observed down to the tricritical point as the transition temperature decreases to 250 K. A tricriticality at a similar temperature is also revealed in the mixed crystals on Sinline imageSe substitution. For the mixed crystals with Sninline imagePb substitution, ultrasound, hypersound, and low-frequency dielectric studies also show heterophase features appearing on decrease of the ferroelectric transition temperature below a so-called “waterline temperature” near 250 K. Such behavior agrees with the Blume–Emery–Griffiths (BEG) model appropriate for the ferroelectric system under investigation with a three-well local potential for the order parameter fluctuations. The BEG model modified by the random-field phase diagram in the vicinity of the tricritical point qualitatively explains the influence of the cationic substitution on the (Pbinline imageSninline image)inline imagePinline imageSinline image ferroelectric properties.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IAS-1)
2. Quanten-Theorie der Materialien (PGI-1)
3. JARA-FIT (JARA-FIT)

Research Program(s):

1. 142 - Controlling Spin-Based Phenomena (POF3-142) (POF3-142)

Appears in the scientific report 2016

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Database coverage:
Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; No Authors Fulltext ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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