Magnetoelectric coupling at the interface of BiFeO3/La0.7Sr0.3MnO3 multilayers

Abstract

Electric-field controlled exchange bias in a heterostructure composed of the ferromagnetic manganite La0.7Sr0.3MO3 and the ferroelectric antiferromagnetic BiFeO3 has recently been demonstrated experimentally. By means of a microscopic model Hamiltonian we provide a possible explanation of the origin of this magnetoelectric coupling. We find, in agreement with experimental results, a net ferromagnetic moment at the BiFeO3 interface. The induced ferromagnetic moment is the result of the competition between the e_g-electrons double exchange and the t_2g-spins antiferromagnetic superexchange that dominate in bulk BiFeO3. The balance of these simultaneous ferromagnetic and antiferromagnetic tendencies is strongly affected by the interfacial electronic charge density which, in turn, can be controlled by the BiFeO3 ferroelectric polarization.

4 pages, including 4 figures

References in corpus (13)

• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• Interface ferromagnetism and orbital reconstruction in BiFeO3- La0.7Sr0.3MnO3 heterostructures
• Exchange bias driven by the Dzyaloshinskii-Moriya interaction and ferroelectric polarization at G-type antiferromagnetic perovskite interfaces
• Metal-insulator transition in $(LaMn{O}_3{)}_{2n}/(SrMn{O}_3{)}_n$ superlattices
• Oxygen-stripes in La0.5Ca0.5MnO3 from ab initio calculations
• Electronic Phase Separation in Manganite/Insulator Interfaces
• Dynamical Mean Field Study of Model Double-Exchange Superlattices
• Unveiling First Order CMR Transitions in the Two-Orbital Model for Manganites
• Continuous Charge Modulated Diagonal Phase in Manganites
• Magnetic interaction at an interface between manganite and other transition metal oxides
• Nanoscale magnetic structure of ferromagnet/antiferromagnet manganite multilayers
• Magnetoresistance in an all-manganite heterostructure
• Electronic and Magnetic Properties of ${\mathrm{RMnO}}_3/{\mathrm{AMnO}}_3$ Heterostructures

Cited by in corpus (10)

• Induced magnetization in La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$/BiFeO${}_3$ superlattices
• The effect of interface roughness on exchange bias in La0.7Sr0.3MnO3 - BiFeO3 heterostructures
• Quantum-Confinement-Induced Magnetism in LaNiO${}_3$-LaMnO${}_3$ Superlattices
• Microscopic model for the ferroelectric field effect in oxide heterostructures
• Magnetic properties of La(0.67)Sr(0.33)MnO3/BiFeO3(001) heterojunctions: chemically abrupt versus atomic intermixed interface
• Polaronic transport induced by competing interfacial magnetic order in a La${}_{0.7}$Ca${}_{0.3}$MnO${}_3$/BiFeO${}_3$ heterostructure
• Room temperature large spontaneous exchange bias in hard-soft antiferromagnetic composite BiFeO3-TbMnO3
• The role of disorder in NaO${}_2$ and its implications for Na-O${}_2$ batteries
• A Real Space Description of Magnetic Field Induced Melting in the Charge Ordered Manganites: I. The Clean Limit
• A Real Space Description of Field Induced Melting in the Charge Ordered Manganites: II. the Disordered Case