Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-11-28
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Scientific paper
Rotating field ac demagnetization protocols are commonly used to access low energy configurations of artificial spin ice. Recent theoretical work [Z. Budrikis et al., Phys. Rev. Lett. 105, 017201 (2010)] has predicted that a simplified rotating constant field protocol applied to finite artificial square ice patterns can create large ground state domains via nucleation and propagation processes starting at array edges. We present an experimental realization of such a protocol and find strong suppression of edge effects and markedly different dependence of ground state ordering on field strength. Simulations incorporating a distribution of switching barrier heights confirm quenched disorder is responsible for these effects. We extend these results by showing analytically that disorder forces incompatible ground state domains to form and thereby blocks complete ground state ordering for all field protocols with constant field strength.
Akerman Johan
Budrikis Zoe
Langridge Sean
Marrows Chris H.
Phipps Morgan Jason
No associations
LandOfFree
Disorder strength and field-driven ground state domain formation in artificial spin ice: experiment, simulation and theory does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Disorder strength and field-driven ground state domain formation in artificial spin ice: experiment, simulation and theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disorder strength and field-driven ground state domain formation in artificial spin ice: experiment, simulation and theory will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-68073