Correlation between magnetism and spin-dependent transport in CoFeB alloys

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Abstract

We report a correlation between the spin polarization of the tunneling electrons and the magnetic moment of amorphous CoFeB alloys. Such a correlation is surprising since the spin polarization of the tunneling electrons involves s-like electrons close to the Fermi level (EF), while the magnetic moment mainly arises due to all the 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 tunability of the electronic and magnetic properties of CoFeB alloys.
Original languageEnglish
Article number016602
Pages (from-to)016602-1/4
Number of pages4
JournalPhysical Review Letters
Volume102
Issue number1
DOIs
Publication statusPublished - 2009

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