Field dependence of the magnetic correlations of the frustrated magnet SrDy2O4

The frustrated magnet SrDy2O4 exhibits a field-induced phase with a magnetization plateau at 1/3 of the saturation value for magnetic fields applied along the b axis. We report here a neutron scattering study of the nature and symmetry of the magnetic order in this field-induced phase. Below T≈0.5 K, there are strong hysteretic effects, and the order is short- or long-ranged for zero-field and field cooling, respectively. We find that the …