Figure 8

(a–c) PNR measurements at 15 K for spin-up and spin-down polarization for two applied fields H_a = −2.5 kOe and −10 kOe along the decreasing branch of the hysteresis loop are plotted versus Q_z (closed symbols) along with their best fits (open symbols) for the [Dy₆/Fe₆]₁₀ sample. The closed or open symbols represent intensities in the R _{+ +} (red) and R_{− −} (black) channels. Schematics of the corresponding helices or 2π domain wall configurations at the two interfaces (Fe-Dy and Dy-Fe) opted for fitting the data at the two fields are shown alongside.