Abstract
The electronic structure and magnetic properties of Fe/NaCl/Fe (0 0 1) magnetic tunnel junction have been studied by means of a first-principles Green's function technique based on the tight-binding linear muffin-tin orbital method in the atomic sphere approximation. The results show the formation of sharp Fe/NaCl interfaces and the enhancement of the interface iron magnetic moment ( M Fe=2.96 μ B). The spin-dependent transport properties in current-perpendicular-to-plane configuration were calculated by means of the transmission matrix formulation of Kubo–Landauer formalism. The main contribution to the conductance in the ferromagnetic state is given by minority-spin electrons. The tunneling magnetoresistance rapidly increases with increasing NaCl barrier width.
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