The nature of anharmonicity and anomalous piezoelectric properties of ferroelectric SbSBr crystal

Autor:	A. Kvedaravičius, L. Žigas, Algirdas Audzijonis
Rok vydání:	2012
Předmět:	Phase transition Materials science Condensed matter physics Anharmonicity Dielectric Soft modes Condensed Matter Physics Ferroelectricity Electronic Optical and Magnetic Materials Crystal Condensed Matter::Materials Science Phase (matter) Atom Electrical and Electronic Engineering
Zdroj:	Physica B: Condensed Matter. 407:774-777
ISSN:	0921-4526
DOI:	10.1016/j.physb.2011.12.023
Popis:	The contribution of soft mode at Sb atom's sites, to the temperature dependences of Sb atom's equilibrium position's difference Δ z ( T ) has been studied theoretically, when SbSBr crystal is deformed along a ( x ), b ( y ) and c ( z )-axis in paraelectric phase and is deformed along c ( z )-axis in ferroelectric phase. The largest change of Δ z 33 ( T ) occurs in the ferroelectric phase near the phase transition temperature in the range from 16 K to 21 K. The temperature dependence of Sb atom's equilibrium position's displacements Δ z 33 is very similar to the temperature dependence of experimental piezoelectric modulus, when SbSBr crystal is deformed in the direction of c ( z )-axis in ferroelectric phase.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a8a605c8a7345d23b6bed08ce47b25bf https://doi.org/10.1016/j.physb.2011.12.023 Zobrazit plný text záznamu Full Text from ScienceDirect