Interface states in CoFe2O4 spin-filter tunnel junctions
نویسندگان
چکیده
منابع مشابه
Effect of interface states on spin-dependent tunneling in Fe/MgO/Fe tunnel junctions
Effect of interface states on spin-dependent tunneling in Fe/MgO/ Fe tunnel junctions" (2005).
متن کاملEmergent spin filter at the interface between ferromagnetic and insulating layered oxides.
We report a strong effect of interface-induced magnetization on the transport properties of magnetic tunnel junctions consisting of ferromagnetic manganite La0.7Ca0.3MnO3 and insulating cuprate PrBa2Cu3O7. Contrary to the typically observed steady increase of the tunnel magnetoresistance with decreasing temperature, this system exhibits a sudden anomalous decrease at low temperatures. Interesti...
متن کاملDual Control of Giant Field-like Spin Torque in Spin Filter Tunnel Junctions
We predict a giant field-like spin torque, T[symbol in text], in spin-filter (SF) barrier tunnel junctions in sharp contrast to existing junctions based on nonmagnetic passive barriers. We demonstrate that has linear bias behavior, is independent of the SF thickness, and has odd parity with respect to the SF's exchange splitting. Thus, it can be selectively controlled via external bias or exter...
متن کاملStrongly bias-dependent tunnel magnetoresistance in manganite spin filter tunnel junctions.
A highly unconventional bias-dependent tunnel magnetoresistance (TMR) response is observed in Sm0.75 Sr0.25 MnO3 -based nanopillar spin filter tunnel junctions (SFTJs) with two different behaviors in two different thickness regimes of the barrier layer. Thinner barrier devices exhibit conventional SFTJ behaviors; however, for larger barrier thicknesses, the TMR-bias dependence is more complex a...
متن کاملReversal of spin polarization in Fe/GaAs (001) driven by resonant surface states: first-principles calculations.
A minority-spin resonant state at the Fe/GaAs(001) interface is predicted to reverse the spin polarization with the voltage bias of electrons transmitted across this interface. Using a Green's function approach within the local spin-density approximation, we calculate the spin-dependent current in a Fe/GaAs/Cu tunnel junction as a function of the applied bias voltage. We find a change in sign o...
متن کامل