  We study memristive effects in Kagom\'{e} nanopatterned permalloy. We observe
that at low frequencies a thermistor effect is present, a phenomenon arising
due to the lithography and absent in similar experiments for thin films.
However, we also show via an independent anisotropic magnetoresistive study
that a small hysteresis accounting for 1% of the effect is not attributable to
a thermistive effect. Such effect is also confirmed by a careful subtraction
scheme between nearby thermal hysteresis. In the millihertz regime, an
effective model is provided to describe the experimental results for the
thermistor, showing that there should be a crossover from the millihertz to the
gigahertz, from a thermistor to an memresistive effect for nanopatterned
permalloy.
