We study the configuration of magnetic moments on triangular lattices of single-domain ferromagnetic islands, examining the consequences of magnetostatic interactions in this frustrated geometry. By varying the island-island distance along one direction, we are able to tune the ratio of different interactions between neighboring islands, resulting in a corresponding variation in the local correlations between the island moments. Unlike other artificial frustrated magnets, this lattice geometry displays regions of ordered moment orientation, possibly resulting from a higher degree of anisotropy leading to a reduced level of frustration.
@article{arxiv.0812.4468,
title = {Tuning magnetic frustration of nanomagnets in triangular-lattice geometry},
author = {Xianglin Ke and Jie Li and Sheng Zhang and Cristiano Nisoli and Vincent H. Crespi and Peter Schiffer},
journal= {arXiv preprint arXiv:0812.4468},
year = {2009}
}