Mechanisms of exchange bias with multiferroic BiFeO3 epitaxial thin films

Abstract

We have combined neutron scattering and piezoresponse force microscopy to study the relation between the exchange bias observed in CoFeB/BiFeO3 heterostructures and the multiferroic domain structure of the BiFeO3 films. We show that the exchange field scales with the inverse of the ferroelectric and antiferromagnetic domain size, as expected from Malozemoff's model of exchange bias extended to multiferroics. Accordingly, polarized neutron reflectometry reveals the presence of uncompensated spins in the BiFeO3 film at the interface with the CoFeB. In view of these results we discuss possible strategies to switch the magnetization of a ferromagnet by an electric field using BiFeO3.

arXiv commentsubmitted to Phys. Rev. Lett

References in corpus (7)

• Very large spontaneous electric polarization in BiFeO3 single crystals at room temperature and its evolution under cycling fields
• Influence of parasitic phases on the properties of BiFeO3 epitaxial thin films
• Oxide spintronics
• Electric field control of exchange bias in multiferroic epitaxial heterostructures
• Structural distortion and magnetism of BiFeO3 epitaxial thin films: a Raman spectroscopy and neutron diffraction study
• Tunnel magnetoresistance and robust room temperature exchange bias with multiferroic BiFeO3 epitaxial thin films
• Combining half-metals and multiferroics into epitaxial heterostructures for spintronics

Cited by in corpus (32)

• Multiferroicity, The coupling between magnetic and polarization
• Multiferroic materials and magnetoelectric physics: symmetry, entanglement, excitation, and topology
• Recent progress in voltage control of magnetism: Materials, mechanisms, and performance
• Nanoscale control of exchange bias with BiFeO3 thin films
• Electric-field control of magnetic domain wall motion and local magnetization reversal
• Electrical control of magnetism by electric field and current-induced torques
• Exchange bias driven by the Dzyaloshinskii-Moriya interaction and ferroelectric polarization at G-type antiferromagnetic perovskite interfaces
• Magnetization Reversal by Electric-Field Decoupling of Magnetic and Ferroelectric Domains Walls in Multiferroic-Based Heterostructures
• Size dependent electric voltage-controlled magnetic anisotropy in multiferroic heterostructures: Interface-charge and strain co-mediated magnetoelectric coupling
• Interfacial Coupling in Multiferroic-Ferromagnet Heterostructures
• 180 degree Ferroelectric Stripe Nanodomains in BiFeO3 Thin Films
• Exchange Bias in BiFe_{0.8}Mn_{0.2}O_3 Nanoparticles with an Antiferromagnetic Core and a Diluted Antiferromagnetic Shell
• Pressure-induced structural, electronic, and magnetic effects in BiFeO3
• Novel Multifunctional Materials Based on Oxide Thin Films and Artificial Heteroepitaxial Multilayers
• Full Control of Magnetism in Manganite Bilayer by Ferroelectric Polarization
• Origin of the reduced exchange bias in epitaxial FeNi(111)/CoO(111) bilayer
• Ab Initio Study of the Intrinsic Exchange Bias at the SrRuO${}_3$/SrMnO${}_3$ Interface
• Manipulation of magnetic domain wall by ferroelectric switching: Dynamic magnetoelectricity at the nanoscale
• Electric-field Induced Reversible Switching of the Magnetic Easy-axis in Co/BiFeO3/SrRuO3/SrTiO3 Heterostructures
• Bismuth-based perovskites as multiferroics
• The origin of exchange bias in multigranular non-collinear IrMn${}_3$/CoFe thin films
• Electrical Control of Exchange Bias Mediated by Graphene
• Magnetoelectro-elastic control of magnetism in an artificial multiferroic
• Element-Specific Depth Profile of Magnetism and Stoichiometry at the La0.67Sr0.33MnO3/BiFeO3 Interface
• Ferroelectric Control of Magnetism and Transport in Oxide Heterostructures
• Polarized neutron channeling as a tool for the investigations of weakly magnetic thin films
• Enhanced optical properties and the origin of carriers transport in BiFeO${}_3$/TiO${}_2$ heterostructures with 109${}^{\circ }$ domain walls
• Field dependent magnetization of BiFeO3 in ultrathin La0.7Sr0.3MnO3/BiFeO3 superlattice
• Effect of magnetoelectrical interactions on multiferroic domain walls
• Non-Altermagnetic Origin of Exchange Bias Behaviors in Incoherent RuO${}_2$/Fe Bilayer Heterostructures
• FMR studies of exchange-coupled multiferroic polycrystalline Pt/BiFeO${}_3$/Ni${}_{81}$Fe${}_{19}$/Pt heterostructures
• Magnetic fingerprint of interfacial coupling between CoFe and nanoscale ferroelectric domain walls