Fig. 4: Magnetic scans in Sr9Ca5Cu24O41.
a L-scan across (0,0,1) in the spin-flip (SFX) channel, showing the magnetic scattering along the ladder legs. The magnetic scattering appears as a Gaussian signal centered at (0,0,1). (Raw data given in Supplementary Note 2). b H-scan of the (H,0,1) rod, the inter-ladders direction (rungs), showing the modulation of the magnetic intensity extracted from XYZ polarization analysis (XYZ-PA) (squares). The inset shows real-space magnetic correlation lengths within the ladder planes. c K-scan across (3,0,1) after full XYZ-PA, indicating the absence of inter-plane magnetic correlations. d Temperature dependence of the magnetic signal, after background subtraction (Raw data given in Supplementary Note 3). The figure combines polarized neutron data (full symbols) measured at (3,0,1) in the SFX channel and unpolarized neutron data (open symbols) measured at (1,0,1). All Q-scans were performed on the instrument 4F1 at 10 K. Lines are guide to the eye. Error bars represent one standard deviation.
