Correlation between magnetism and spin-dependent transport in CoFeB alloys

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.

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

References in corpus (1)

• Spin tunneling in junctions with disordered ferromagnets

Cited by in corpus (4)

• Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers
• Terahertz spin currents and inverse spin Hall effect in thin-film heterostructures containing complex magnetic compounds
• Magnonic spin-wave modes in CoFeB antidot lattices
• Enhanced orbital magnetic moments in magnetic heterostructures with interface perpendicular magnetic anisotropy