2000/11/03 by Peter Zahn, Zahn, Peter, Ingrid Mertig +1
Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.cond-mat/0011062
6 pages, 4 figures, subm. to J. Appl. Phys
arxiv created 2000/11/03 · arxiv updated 2009/11/30
Based on spin-density functional theory we calculate the electronic structure of a tunnel junction consisting of two magnetic Fe layers separated by an insulating vacuum barrier selfconsistently. For the conductance the Landauer formula is evaluated in the ballistic limit as function of the magnetic configuration. Based on these conductances the tunnel magnetoresistance (TMR) ratio is obtained. We investigate the relation between TMR ratio and spin polarization of the electronic structure at the metal/insulator interface.