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Tuning magnetic frustration of nanomagnets in triangular-lattice geometry

2008; American Institute of Physics; Volume: 93; Issue: 25 Linguagem: Inglês

10.1063/1.3043687

1520-8842

Xianglin Ke, Jie Li, Sheng Zhang, Cristiano Nisoli, Vincent H. Crespi, P. Schiffer,

Organic and Molecular Conductors Research

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 ratios 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.