Speaker
Artur Gregor Glavic
Description
Patterns of nano-scale magnets are important systems to investigate potential applications but also fundamental physics of dipole-diple interactions. With certain frustration, artificial spin-ices can be created with highly degenerate ground states. These form only short range magnetic correlations that were predicted by Monte-Carlo simulations.
We have used GISANS to study the magnetic correlations in a system of out-of-plane magnetized FeNi cylinders on a triangular lattice. Using the Yoneda line to extract a cut in the in-plane structure factor at various sample rotations we could gather the full 2D structure factor.
With the application of reverse Monte-Carlo modeling and DWBA we were able to perform a model free data analysis.
Author
Artur Gregor Glavic
Co-author
Gavin Macauley
(ETH Zurich - Paul Scherrer Institute)
