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000167739 1001_ $$0P:(DE-HGF)0$$aBrüssing, F.$$b0$$eCorresponding author
000167739 245__ $$aDirect observation of Cr spin polarization in epitaxial Cr/Co/Cr(100) trilayers
000167739 260__ $$aCollege Park, Md.$$bAPS$$c2013
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000167739 520__ $$aThe spin polarization of chromium at the interface next to a ferromagnetic layer is of general interest because of the competing ferromagnetic and antiferromagnetic exchange coupling. While the Fe/Cr interface has been well studied, information on the Co/Cr interface still remains scarce. Here we show for epitaxially grown Cr/Co/Cr(100) trilayers with smooth interfaces x-ray resonant magnetic scattering (XRMS) results in a saturation field of ±270 mT, recorded at the Co and Cr L3 edges, respectively. The XRMS results at the Co edge show the expected asymmetry and a ferromagnetic hysteresis for different incident angles θ. Furthermore, XRMS measurements with the energy tuned to the Cr L3 edge also exhibit an asymmetry, albeit much smaller than the one at the Co L3 edge. Moreover, the magnetic hysteresis of Cr taken at the L3 edge has a sign opposite to that of Co at the L3 edge over a broad range of incident angles. From these results we infer first that at the Co/Cr interface chromium is ferromagnetically polarized, and second that its spin structure is oriented opposite to the magnetization of Co.
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000167739 7001_ $$0P:(DE-H253)PIP1009056$$aEwerlin, M.$$b1
000167739 7001_ $$0P:(DE-H253)PIP1014641$$aAbrudan, R.$$b2
000167739 7001_ $$0P:(DE-H253)PIP1008081$$aZabel, H.$$b3
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