a Department of Physics and Astronomy, University of California, 4129 FRH, Irvine, CA 92697, USA
b Institito de Fisca, Universidade Federal Fluminense, Niteroi 24210-340, Brazil
Abstract:
We have calculated the I–V curves, dynamical conductance, and tunneling magnetoresistance (TMR) of 1D magnetic tunneling junction through singleband tight binding model calculations based on the non-equilibrium Green's function approach. The difference in density of state of two ferromagnetic leads and the bias dependence of the propagator cause intrinsic asymmetries in TMR and dynamical conductance at finite bias. Besides, we have displayed that large TMR can be obtained even at high bias for half metallic leads.