  Hybrid magnetic arrays embedded in superconducting films are ideal systems to
study the competition between different physical (such as the coherence length)
and structural length scales such as available in artificially produced
structures. This interplay leads to oscillation in many magnetically dependent
superconducting properties such as the critical currents, resistivity and
magnetization. These effects are generally analyzed using two distinct models
based on vortex pinning or wire network. In this work, we show that for
magnetic dot arrays, as opposed to antidot (i.e holes) arrays, vortex pinning
is the main mechanism for field induced oscillations in resistance R(H),
critical current Ic(H), magnetization M(H) and ac-susceptibility Xac(H) in a
broad temperature range. Due to the coherence length divergence at Tc, a
crossover to wire network behavior is experimentally found. While pinning
occurs in a wide temperature range up to Tc, wire network behavior is only
present in a very narrow temperature window close to Tc. In this temperature
interval, contributions from both mechanisms are operational but can be
experimentally distinguished.
