Influence of isomorphous substitution of metal ion on the low-frequency dielectric dispersion in NH2(CH3)2Al1−xCrx(SO4)2⋅6H2O ferroelectrics. (1st February 2017)

• Record Type: Journal Article
• Authors: Kapustianyk, V.; Eliyashevskyy, Yu.; Czapla, Z.; Dacko, S.; Rudyk, V.; Sereda, S.; Ostapenko, N.
• Is Part Of: Phase transitions. Volume 90:Number 2(2017)
• Page Start: 175
• Page End: 188
• Publication Date: 2017-02-01
• Subjects: Dielectric dispersion -- ferroelectric crystal -- phase transition -- chromium; 77.84.-s -- 77.80.B- -- 77.22.Gm -- 75.78.Fg; Phase transformations (Statistical physics) -- Periodicals; 530.47405
• DOI: 10.1080/01411594.2016.1170126
• Languages: English
• ISSNs: 0141-1594

Abstract

ABSTRACT: This paper is devoted to the study of the influence of metal ion isomorphous substitution on the ferroelastic-ferroelectric phase transition and dispersion caused by the motion of domain walls in dimethylammonium metal sulfate hexahydrate DMAAl1 − x Cr x S ferroelectric crystals ( x = 0, 0.065, 0.2). It is shown that such a substitution significantly changes the phase transition temperature and parameters of the dielectric dispersion. These changes are explained in terms of interaction between the metal-hydrate complexes and DMA groups that carry the dipole moment and due to this they are responsible for the phase transitions and motion of the domain walls.