Size-Dependent Spin Structures in NPs

Size-Dependent Spin Structures in Iron Nanoparticles.
A. Fraile Rodríguez, A. Kleibert, J. Bansmann, A. Voitkans, L. J. Heyderman, and F. Nolting
Phys. Rev. Lett. 104, 127201 (2010)

(a) Size dependence of the absolute value of the in-plane canting angles between the film and the
upper particle magnetization. White dots: experimental data. Solid and dashed: calculated curves for two values of Ku.    (b) Sketch of the spin structure of a Wulff-shaped 10-nm particle and Ku=50 10-6eV=atom. (c) Size dependence of
the experimental spread.