Correlation between magnetism and spin-dependent transport in CoFeB alloys

Details Correlation between magnetism and spin-dependent transport in CoFeB alloys Correlation between magnetism and spin-dependent transport in CoFeB alloys

2008-12-03

arxiv.org/abs/0812.0679v1

Physics

Condensed Matter

Materials Science

Accepted for publication in Physical Review Letters. Letter (4 pages) and Supplementary material (4 pages)

Scientific paper

10.1103/PhysRevLett.102.016602

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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