Investigations of interface spin asymmetry and interfacial resistance in FexCo100-x/Ag interface

J. W. Jung, Z. Jin, Y. Shiokawa, M. Sahashi

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4 Citations (Scopus)


We investigated current-perpendicular-to-plane (CPP) magnetotransport parameters of FexCo100-x/Ag interfaces: interface specific resistance (ARF/N), extended interface resistance (ARF/N), and spin scattering asymmetry (γ). We also investigated the dependence of interfacial parameters on the giant magnetoresistance effect with CPP geometry. For measuring these parameters, we prepared magnetic multilayers and pseudo spin valves (PSVs), combining the ferromagnetic (F) alloys Fe, Co, Fe50Co50, and Fe30Co70 with the nonmagnetic (N) metal Ag. In all cases, the largest ARF/N value was found to be ∼0.68 mΩ μm2 with an enhanced ARF/N value of ∼1.9 mΩ μm2 for a (001)-oriented Fe/Ag interface, which suggests that spin-up and spin-down electrons on the Fermi surface have very different transmission probabilities. Such an interface can act as a spin filter through which only one type of electrons can pass.

Original languageEnglish
Article number17A323
JournalJournal of Applied Physics
Issue number17
Publication statusPublished - 2015 May 7

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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