Stress-induced phase transition in ferroelectric domain walls of BaTiO.sub.3./sub

0378640 - FZÚ 2013 RIV GB eng J - Článek v odborném periodiku
Stepkova, Vilgelmina - Márton, Pavel - Hlinka, Jiří
Stress-induced phase transition in ferroelectric domain walls of BaTiO₃
Journal of Physics-Condensed Matter. Roč. 24, č. 21 (2012), 1-4. ISSN 0953-8984. E-ISSN 1361-648X
Grant CEP: GA ČR GAP204/10/0616
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: phase transition * ferroelectric domain walls * BaTiO₃ * rhombohedral * phase-field simulations * epitaxial stress * chiral
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.355, rok: 2012

The seminal paper by Zhirnov (1958 Zh. Eksp. Teor. Fiz. 35 1175-80) explained why the structure of domain walls in ferroelectrics and ferromagnets is drastically different. Here we show that the antiparallel ferroelectric walls in rhombohedral ferroelectric BaTiO3 can be switched between the Ising-like state (typical for ferroelectrics) and a Bloch-like state (unusual for ferroelectric walls but typical for magnetic ones). Phase-field simulations using a Ginzburg-Landau-Devonshire model suggest that this symmetry-breaking transition can be induced by a compressive epitaxial stress. The strain-tunable chiral properties of these domain walls promise a range of novel phenomena in epitaxial ferroelectric thin films.
Trvalý link: http://hdl.handle.net/11104/0210061