Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-03-13
Nano Letters, 2007, Vol.7, No.4, pp.927-931.
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 4 figs, to be published in Nano Letters
Scientific paper
We report an observation of spin-valve like hysteresis within a few atomic layers at a ferromagnetic interface. We use phonon spectroscopy of nanometer sized point contacts as an in-situ probe to study the mechanism of the effect. Distinct in energy phonon peaks for contacts with dissimilar nonmagnetic outer electrodes allow to localize the observed spin switching to the top or bottom interfaces for nanometer thin ferromagnetic layers. The mechanism consistent with our data is energetically distinct atomically thin surface spin layers that can form current or field driven surface spin-valves within a single ferromagnetic film.
Balkashin O. P.
Fisun V. V.
Konovalenko Aleksander
Korenivski Vlad
Naidyuk Yu. G.
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