Fig. 4: Effect of external field.

a1–a7 The diffraction maps measured with SANS-I in different fields along [110] at 40 K. b1, b2 Comparison of simulated structure factors in absence and presence of external field applied along [11] direction (horizontal to the figure) for the model with easy plane anisotropy only. c1, c2 Simulations in the same conditions but with introduction of the DMI interaction into the model. d1, d2 The real space representation of simulated above structure factors. Each column corresponds to the (b1–c2) panel above. The top row shows the in-plane orientation of the magnetic moment as \(\arctan ({S}_{{{\rm{y}}}}/{S}_{{{\rm{x}}}})\), the color circle in-between panels indicates the angle-color correspondence. The bottom row shows the out-of-plane component S_z.