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arXiv · 0812.0679

Correlation between magnetism and spin-dependent transport in CoFeB alloys

P. V. Paluskar·R. Lavrijsen·M. Sicot·J. T. Kohlhepp·H. J. M. Swagten·B. Koopmans
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Abstract

We report a correlation between the spin polarization of the tunneling electrons (TSP) and the magnetic moment of amorphous CoFeB alloys. Such a correlation is surprising since the TSP involves s-like electrons close to the Fermi level (EF), while the magnetic moment mainly arises due to all d-electrons below EF. We show that probing the s and d-bands individually provides clear and crucial evidence for such a correlation to exist through s-d hybridization, and demonstrate the tuneability of the electronic and magnetic properties of CoFeB alloys.

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P. V. Paluskar, R. Lavrijsen, M. Sicot, J. T. Kohlhepp, H. J. M. Swagten, B. Koopmans. 2008-12-03. Correlation between magnetism and spin-dependent transport in CoFeB alloys. https://doi.org/10.1103/physrevlett.102.016602

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