%0 Journal Article
%A Nemes, Norbert Marcel
%A Sánchez Santolino, Gabriel
%A Varela Del Arco, María
%A Sefrioui, Zouhair
%A León Yebra, Carlos
%A Santamaría Sánchez-Barriga, Jacobo
%T Reversible electric-field control of magnetization at oxide interfaces
%D 2014
%@ 2041-1723
%U https://hdl.handle.net/20.500.14352/33971
%X Electric-field control of magnetism has remained a major challenge which would greatly impact data storage technology. Although progress in this direction has been recently achieved, reversible magnetization switching by an electric field requires the assistance of a bias magnetic field. Here we take advantage of the novel electronic phenomena emerging at interfaces between correlated oxides and demonstrate reversible, voltage-driven magnetization switching without magnetic field. Sandwiching a non-superconducting cuprate between two manganese oxide layers, we find a novel form of magnetoelectric coupling arising from the orbital reconstruction at the interface between interfacial Mn spins and localized states in the CuO2 planes. This results in a ferromagnetic coupling between the manganite layers that can be controlled by a voltage. Consequently, magnetic tunnel junctions can be electrically toggled between two magnetization states, and the corresponding spin-dependent resistance states, in the absence of a magnetic field.
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