Speaker
Naëmi Leo
(Paul Scherrer Institute)
Description
Correlations in low-dimensional magnetic systems result in interesting properties, especially if continuous spin degrees of freedom are involved. Here we observe the magnetic correlations of dipolar-coupled artificial XY moments (circular nanomagnets) on a square lattice as a function of temperature using low-energy muon-spin relaxation. For strong interactions between the nanomagnets, we observe the onset of slow collective dynamics below a tunable critical temperature. In contrast, the dynamics in weakly-interacting systems is described by the blocking of individual nanomagnets which happens at considerably lower temperatures.
Authors
Naëmi Leo
(Paul Scherrer Institute)
Stefan Holenstein
(Paul Scherrer Institute)
Dominik Schildknecht
(Paul Scherrer Institute)
Oles Sendetskyi
(Paul Scherrer Institute)
Peter Derlet
(Paul Scherrer Institute)
Hubertus Luetkens
(Paul Scherrer Institute)
Stephen Lee
(St. Andrews University, St. Andrews, Scotland)
Laura Heyderman
(ETH Zurich - Paul Scherrer Institute)
