Fig. 4. The 180° domain-wall widths measured in the virgin state of an unfilled easy-axes hexagon with 2-μm-wide bars.

a, XMLD-PEEM image of the unfilled hexagon. Vertical bars containing 180° domain walls are shown as zoomed in insets. Line profiles across the domain walls are identified by red boxes labelled 1–3. b, Average domain-wall profile (black), measured in the XMLD and overlaid sech² fit line (red). The calculated domain-wall width is w = 134 ± 5 nm. c,d, The same as in a and b, but measured in the corresponding XMCD-PEEM image. The average line profile, from dark to light domains, is fitted with a tanh function and the calculated width is w = 122 ± 13 nm.