Speaker
Gavin Macauley
(Paul Scherrer Institute / ETH Zurich)
Description
Artificial spin ices are arrays of strongly-correlated nanomagnets, which provide a valuable platform to study phase transitions. The kagome artificial spin ice is a highly frustrated example that undergoes two separate ordering transitions. We show how rotating each nanomagnet in the kagome lattice about its centre allows us to access a rich phase diagram. Using a combination of magnetic force microscopy to characterise the as-grown states and x-ray photoemission electron microscopy to observe the thermally-active states, we determine how ordering proceeds in the different arrays. We find that the rotation maps from a spin ice sector near hexagonal geometries to a ferromagnetic phase, and then to a flux closed state.
Author
Gavin Macauley
(Paul Scherrer Institute / ETH Zurich)
Co-authors
Luca Berchialla
(Paul Sherrer)
Aleksandra Pac
Tianyue Wang
(Paul Scherrer Institute/ETH Zurich)
Rhea Stewart
(ETH Zurich and Paul Scherrer Institut)
Dr
Armin Kleibert
(Swiss Light Source, Paul Scherrer Institute)
Valerio Scagnoli
(ETH Zurich)
Peter Derlet
(ETH Zurich - Paul Scherrer Institute)
Laura Heyderman
(ETH Zurich - Paul Scherrer Institute)
