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. 2014 Apr 1;4:4553. doi: 10.1038/srep04553

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(a) Locally coupled magnetic and ferroelectric domains in the Co_0.9Fe_0.1(CoFe)/BiFeO₃(BFO) heterostructure reproduced by phase-field model (the first row), based on electric-field switching of the interfacial exchange coupling field H_DM which is perpendicular to the plane of electric polarization P and the antiferromagnetic axis L in BFO (the second row). The slim arrows indicate orientations of local magnetization vectors. (b) Schematic of an epitaxial BFO film with partially relaxed substrate clamping when the film thickness t_p exceeds the critical value t_c for the generation of interfacial dislocations.