Position of Fe ions in MgO crystalline structure

Interface Fe magnetic moment enhancement in MgO/Fe/MgO trilayers

Electronic structure and lattice relaxation related to Fe in MgO.

The electronic structure of Fe impurity in MgO was calculated by the linear muffin-tin orbital–full-potential method within the conventional local-density approximation (LDA) and making use of the LDA+U formalism. The importance of introducing different potentials, depending on the screened Coulomb integral U , is emphasized for obtaining a physically reasonable ground state of the Fe ion confi...

Simulation of tunneling magneto-resistance in Fe/MgO/Fe junction

The conductivity asymmetry of junctions with insulating MgO barriers embedded between ferromagnetic Fe electrodes has been investigated by the first principles calculation program of Atomistix ToolKit 2008. The conductivity in up-spin electron is larger than that in down-spin electron for the ideal structure. It leads to the large TMR ratio. The defect of O or Fe atoms hardly varies the conduct...

Electronic structure and crystalline coherence in Fe/Si multilayers

Soft x-ray fluorescence spectroscopy has been used to examine the electronic structure of deeply buried silicide thin films that arise in Fe/Si multilayers. These systems exhibit antiferromagnetic (AF) coupling of the Fe layers, despite their lack of a noble metal spacer layer found in most GMR materials. Also, the degree of coupling is very dependent on preparation conditions, especially space...

Enhanced Interlayer Exchange Coupling in Co/Fe/MgO/Fe(001)

We investigate the bilinear and biquadratic interlayer exchange coupling in Co/Fe/MgO/Fe(001). Samples are grown through molecular beam epitaxy and the interlayer exchange coupling is measured through magneto-optic Kerr effect along wedge samples. By varying the location of Fe impurities between the interface and middle of the MgO spacer, we find that the couplings are enhanced and are dependen...