  We have investigated the spin wave modes of strongly dipolar coupled, highly
anisotropic nanoislands forming square artificial spin ice system using
micromagnetic simulation in MUMAX3 in combination with Matlab coding.
Artificial spin ice is considered to be formed by the four square ring-type
structure of elliptical cross-section nanoislands. Our results state the direct
relation between the spin wave modes generated and the micro-states formed in
the system. We have shown that single ring type structure can alone be
adequately used to understand the spin wave modes of square artificial spin
ice.
