Fe magnetic moment a MgO interface

Interfacial geometry dependence of the iron magnetic moment: The case of MgO/Fe/MgO.
Juan Ignacio Beltrán, Lluis Balcells, and Carlos Martínez-Boubeta
Phys. Rev. B 85, 064417 (2012)

Magnetic moment averaged per Fe atom from SQUID measurements (black circles), together with theoretical calculations of MgO/Fe/MgO structures with symmetric Fe-O bonding (green diamonds), and asymmetric coordination (blue triangles), as a function of the Fe thickness. The experimental data are fitted to a phenomenological exponential decaying function (as
mm = mmbulk + mmsurface e[1−thickness]/k, with the characteristic decay length k = 6 ML), which converge at large coverage to bulk Fe values.