Ferroelectric charged domain walls in an applied electric field

0382300 - ÚFP 2013 RIV US eng J - Journal Article
Gureev, M.Y. - Mokrý, Pavel - Tagantsev, A.K. - Setter, N.
Ferroelectric charged domain walls in an applied electric field.
Physical Review. B. Roč. 86, č. 10 (2012), s. 104104-104104. ISSN 1098-0121
R&D Projects: GA MŠMT(CZ) ED2.1.00/03.0079
Institutional research plan: CEZ:AV0Z20430508
Keywords : Charged ferroelectric domain walls * thermodynamics * ferroelectric domains * CRYSTALS * INVERSION * TITANATE
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.767, year: 2012
http://prb.aps.org/pdf/PRB/v86/i10/e104104

The interaction of electric fieldwith charged domainwalls in ferroelectrics is theoretically addressed.Ageneral expression for the force acting per unit area of a charged domain wall carrying free charge is derived. It is shown that, in proper ferroelectrics, the free charge carried by the wall is dependent on the size of the adjacent domains. As a result, the mobility of such domain wall (with respect to the applied field) is sensitive to the parameters of the domain pattern containing this wall. The problem of the force acting on a charged planar 180◦ domain wall normal to the polarization direction in a periodic domain pattern in a proper ferroelectric is analytically solved in terms of Landau theory. The poling of a crystal containing such pattern, stabilized by the pinning pressure, is also considered. Except for a special situation, the presence of charge domain walls makes poling more difficult.¨The results obtained are also applicable to zigzag walls under the condition that
Permanent Link: http://hdl.handle.net/11104/0212560