Coupling of order parameters, chirality, and interfacial structures in multiferroic materials

被引：53

作者：

Conti, Sergio ^{[1
]}

Mueller, Stefan ^{[1
,2
]}

Poliakovsky, Arkady ^{[1
]}

Salje, Ekhard K. H. ^{[3
]}

机构：

[1] Univ Bonn, Inst Angew Math, D-5300 Bonn, Germany

[2] Univ Bonn, Hausdorff Ctr Math, D-5300 Bonn, Germany

[3] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2011年 / 23卷 / 14期

关键词：

ATOMIC-FORCE MICROSCOPY; DOMAIN-WALLS; PHASE-TRANSITIONS; LEAD PHOSPHATE; TWIN WALLS; FERROELASTIC CRYSTALS; MESOSCOPIC STRUCTURES; PATTERN-FORMATION; NEEDLE TWINS; SIMPLE-MODEL;

D O I：

10.1088/0953-8984/23/14/142203

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study optimal interfacial structures in multiferroic materials with a biquadratic coupling between two order parameters. We discover a new duality relation between the strong coupling and the weak coupling regime for the case of isotropic gradient terms. We analyze the phase diagram depending on the coupling constant and anisotropy of the gradient term, and show that in a certain regime the secondary order parameter becomes activated only in the interfacial region.

引用

页数：8

共 55 条

[1] RENORMALIZATION PHENOMENA IN BA-DILUTED FERROELASTIC LEAD PHOSPHATE, (PB1-XBAX)(3)(PO4)(2) [J].