Planar surfaces of point dipoles as a platform for 2d magnetic structure research

SINDY JULIETH RODRÍGUEZ SOTELO; IGOR STANKOVIC; MYRIAM H. AGUIRRE; PASSEGGI (H) M.C.G; B. CÓSIC; G. GARCÍA

Bariloche

Workshop; SPIN ARGENTINA; 2022

Our system consists of planar magnetic structures created by the assembly of point dipoles.The departure point of this work is the known degeneracy of ground states in planar square andtriangular packings. The square lattice has a particularly interesting antiferromagnetic groundstate exhibiting a transformation from percolating antiferromagnetic chains of dipoles pointinghead-tail to a remarkable magnetic vortex configuration [1]. We follow the breakup ofdegeneracy observed in planar square and triangular packings with a mismatch of theorientation of stacked lattices, see Figure (a) and (b). We further investigate, cf. in figure (c),the ability of these surfaces to carry spin current and manifest the magnetoelectric effect [2].