Influence of interface structure on the tunnelling spin polarization of CoFeB alloys

P.V. Paluskar, J.T. Kohlhepp, H.J.M. Swagten, B. Koopmans, R. Wolters, H. Boeve, E. Snoeck

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

We present measurements of tunnelling spin polarization (TSP) of CoFeB alloys in Al/AlOx/CoFeB tunnel junctions using superconducting tunnelling spectroscopy. We observe that though Co72Fe20B8 (at.%) layers crystallize in the fcc structure, in junctions annealed above 300 DegC the measured TSP degrades, indicating that in these junctions the TSP of amorphous CoFeB is higher than its cryst. counterpart.
Original languageEnglish
Pages (from-to)1234-1237
JournalJournal of Physics D: Applied Physics
Volume40
Issue number5
DOIs
Publication statusPublished - 2007

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