Precise determination of the orientation of the Dzialoshinskii-Moriya vector in κ-(BEDT-TTF)2Cu[N(CN)2]Cl -: art. no. 167002

A novel electron spin-reorientation transition is discovered by C-13 NMR in the quasi-two-dimensional organic antiferromagnet kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Cl. The spin reorientation occurs as an external field is swept through the orientation of the characteristic vector of the Dzialoshinskii-Moriya (DM) interaction, thus providing a precise determination of the orientation of the DM vector. Such a spin reorientation could help to characterize the DM interaction in other antiferromagnetic systems.