ABSTRACT
This chapter shows that the spin reconstruction at the interfaces drives them into a novel magnetic state that acts as a spin filter. It considers the cases in which the origin of the induced magnetism is the superexchange interaction between B-site cations at both sides of the interface resulting from the bond reconstruction. The chapter suggests that the interfacial magnetism offers an interesting alternative route for the electric field control of the magnetism of the electrodes in a magnetic tunnel junction, a functionality, which is being actively pursued for the development of low-dissipation spintronics. It describes the use of the induced moment at the interface between cuprates and manganites to manipulate tunneling transport in magnetic tunnel junctions. Transport measurements of magnetic tunnel junctions have shown that the spin polarization at manganite interface decays faster than the bulk magnetization, suggesting the presence of an effective mechanism to reverse spins at the interfaces.
