Correlation between magnetism and spin-dependent transport in CoFeB alloys

P. V. Paluskar (1) , R. Lavrijsen (1) , M. Sicot (2, 1) , J. T. Kohlhepp (1) , H. J. M. Swagten (1) , B. Koopmans (1)

1 TU/e - Eindhoven University of Technology [Eindhoven]
2 University of Konstanz

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.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

P. V. Paluskar, R. Lavrijsen, M. Sicot, J. T. Kohlhepp, H. J. M. Swagten, et al.. Correlation between magnetism and spin-dependent transport in CoFeB alloys. 2008. ⟨hal-00845832⟩