Abstract
We present measurements of tunneling spin polarization (TSP) of Co72Fe20B8 alloys in Al/Al2O3/Co72Fe20B8 tunnel junctions to further unravel the role of crystn. of the CoFeB electrodes. Whereas the TSP of films of a few hundred A ngstrom is rather insensitive to anneals up to 500 C , a 50 A film shows a strong redn. of TSP. It is hypothesized that these differences are related to a rather inhomogeneous crystn. of the Co72Fe20B8. Magneto-optical Kerr-effect measurement on 300 A thick CoFeB wedges are used to relate the measured coercivity to these crystn. processes.
Original language | English |
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Pages (from-to) | 2012-2014 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 310 |
Issue number | 2, Pt. 3 |
DOIs | |
Publication status | Published - 2007 |