We present a combined experimental and theoretical investigation of the magnetic behavior of ultra-thin Cr films grown on oxygen-passivated Fe(001)-p(1×1)O substrates. In all cases, oxygen floats on the metal/vacuum interface, where a monolayer-range oxide with peculiar electronic and structural characteristics is formed. Significant differences with previous experimental realizations of the Cr/Fe(001) heterostructure are thus introduced by the presence of oxygen. However, we show here that the magnetic behavior of our system is characterized by the same AF stacking at the Cr-Fe interface and by a layer-wise AF order in the Cr layer. In addition, we are able to circumvent the issue of chemical mixing at the Cr-Fe interface, characteristic of standard preparations.
Alberto Calloni, Giulia Berti, Alberto Brambilla, Gianlorenzo Bussetti, Marco Finazzi, Lamberto Duò, Franco Ciccacci, and Guido Fratesi, "Magnetism in thin Cr films grown on Fe(001)-p(1×1)O: a spin-resolved investigation of single and multi-layers," Proc. SPIE 9551, Spintronics VIII, 95511K (Presented at SPIE Nanoscience + Engineering: August 12, 2015; Published: 8 September 2015); https://doi.org/10.1117/12.2188435.
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