A crystal lattice’s quirky behavior is not an elementary monopole. This and similar phenomena are done with lattice formations as a sort of trick. At low enough temperatures geometric frustration prevents the full superdiamagnetism effect from taking hold. It’s novel and potentially very useful but not related to Dirac’s elementary particle proposition.
It's related insofar as it models or mimics the behavior of magnetic monopoles. Certainly it is no step towards the discovery of elementary magnetic monopoles, or anything of that sort.