title: Effect of strain on voltage-controlled magnetism in BiFeO₃-based heterostructures.
abstract: Voltage-modulated magnetism in magnetic/BiFeO3 heterostructures can be driven by a combination of the intrinsic ferroelectric-antiferromagnetic coupling in BiFeO3 and the antiferromagnetic-ferromagnetic exchange interaction across the heterointerface. However, ferroelectric BiFeO3 film is also ferroelastic, thus it is possible to generate voltage-induced strain in BiFeO3 that could be applied onto the magnetic layer across the heterointerface and modulate magnetism through magnetoelastic coupling. Here, we investigated, using phase-field simulations, the role of strain in voltage-controlled magnetism for these BiFeO3-based heterostructures. It is predicted, under certain condition, coexistence of strain and exchange interaction will result in a pure voltage-driven 180° magnetization reversal in BiFeO3-based heterostructures.
authors.affiliation: 1] State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China [2].
authors.forename: J J
authors.initials: JJ
authors.lastname: Wang
authors.affiliation: 1] State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China [2] Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania, 16802, USA [3].
authors.forename: J M
authors.initials: JM
authors.lastname: Hu
authors.affiliation: Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania, 16802, USA.
authors.forename: T N
authors.initials: TN
authors.lastname: Yang
authors.affiliation: State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
authors.forename: M
authors.initials: M
authors.lastname: Feng
authors.affiliation: Department of Physics, Beijing Normal University, Beijing, 100875, China.
authors.forename: J X
authors.initials: JX
authors.lastname: Zhang
authors.affiliation: 1] State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China [2] Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania, 16802, USA.
authors.forename: L Q
authors.initials: LQ
authors.lastname: Chen
authors.affiliation: State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
authors.forename: C W
authors.initials: CW
authors.lastname: Nan