Origin of the magnetoelectric coupling effect in Pb(Zr0.2Ti0.8)O3/La0.8Sr0.2MnO3 multiferroic heterostructures

Abstract

The electronic valence state of Mn in Pb(Zr0.2Ti0.8)O3/La0.8Sr0.2MnO3 multiferroic heterostructures is probed by near edge x-ray absorption spectroscopy as a function of the ferroelectric polarization. We observe a temperature independent shift in the absorption edge of Mn associated with a change in valency induced by charge carrier modulation in the La0.8Sr0.2MnO3, demonstrating the electronic origin of the magnetoelectric effect. Spectroscopic, magnetic, and electric characterization shows that the large magnetoelectric response originates from a modified interfacial spin configuration, opening a new pathway to the electronic control of spin in complex oxide materials.

5 pages, 3 figures. Accepted for publication in Physical Review Letters.

References in corpus (1)

• Electric field control of exchange bias in multiferroic epitaxial heterostructures

Cited by in corpus (4)

• Giant Tunneling Electroresistance Effect Driven by an Electrically Controlled Spin Valve at a Complex Oxide Interface
• Charge states and magnetic ordering in LaMnO3/SrTiO3 superlattices
• Evolution of the band alignment at polar oxide interfaces
• Ferroelectric Control of Magnetism and Transport in Oxide Heterostructures