Spin tunneling in junctions with disordered ferromagnets

P.V. Paluskar, J.J. Attema, G.A. Wijs, de, S. Fiddy, E. Snoeck, J.T. Kohlhepp, H.J.M. Swagten, R.A. Groot, de, B. Koopmans

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Abstract

We provide compelling evidence to establish that, contrary to one's elementary guess, the tunneling spin polarization (TSP) of amorphous CoFeB is larger than that of fcc CoFeB. First-principles atomic and electronic structure calculations reveal striking agreement between the measured TSP and the predicted s-electron spin polarization. Given the disordered structure of the ternary alloy, not only do these results strongly endorse our communal understanding of tunneling through AlOx, but they also portray the key concepts that demand primary consideration in such complex systems.
Original languageEnglish
Article number057205
Pages (from-to)057205-1/4
Number of pages4
JournalPhysical Review Letters
Volume100
Issue number5
DOIs
Publication statusPublished - 2008

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