**6. Conclusions**

In conclusion, this chapter reports on the magnetic study of Fe/MgO/Fe of planar nanometric thin films, nanocolumns and nanowires encapsulated inside carbon nanotubes. Deposition conditions in particular geometry and most notably encapsulation influence both structural and magnetic properties of Fe/MgO/Fe TMR. Nanowires of Fe/MgO/Fe showed superior magnetic properties than planar thin films. The in-plane value of the coercive field of nanowires is higher by 754% than planar thin films.
