Fe3O4/MgO/Fe Heteroepitaxial Structures for Magnetic Tunnel Junctions
IEEE TRANSACTIONS ON MAGNETICS
In this work we report the growth and structural and magnetic characterization of heteroepitaxial Fe3O4/MgO/Fe junctions. All three layers have been deposited by pulsed laser deposition. Combining High Resolution Transmission Electron Microscopy and X-ray results, we have obtained for the heterostructure the epitaxy relation MgO(001) [100]//Fe3O4(001)[100]/MgO(001) [100]/Fe(001)[110]. All interfaces appear very sharp with relatively small root-mean square (rms) roughness, similar to 0.2 nm. The magnetic coupling between Fe3O4 and Fe electrodes is also very small, J similar to 0.03 mJ/m(2) (MgO barrier thickness of 2 nm). Microfabrication of Magnetic Tunnel Junctions from these heterostructures is in progress.
In this work we report the growth and structural and magnetic characterization of heteroepitaxial Fe3O4/MgO/Fe junctions. All three layers have been deposited by pulsed laser deposition. Combining High Resolution Transmission Electron Microscopy and X-ray results, we have obtained for the heterostructure the epitaxy relation MgO(001) [100]//Fe3O4(001)[100]/MgO(001) [100]/Fe(001)[110]. All interfaces appear very sharp with relatively small root-mean square (rms) roughness, similar to 0.2 nm. The magnetic coupling between Fe3O4 and Fe electrodes is also very small, J similar to 0.03 mJ/m(2) (MgO barrier thickness of 2 nm). Microfabrication of Magnetic Tunnel Junctions from these heterostructures is in progress.