Data for "Magnetic Field Dependence of Critical Fluctuations in CeCu$_{5.8}$Ag$_{0.2}$"

Data used for “Magnetic Field Dependence of Critical Fluctuations in CeCu$_{5.8}$Ag$_{0.2}$”. The study was conducted on a well characterized single-crystal CeCu$_{5.8}$Ag$_{0.2}$ in the (H, 0, L)-scattering plane. The data presented here were obtained at the cold spectrometer CAMEA at the Paul Scherrer Institute (PSI), Switzerland. A vertical 11 T cryomagnet was used for field applied along the $b$-axis, while an in-plane 1.8 T cryomagnet was used for field along the $c$-axis. In both cases, a dilution insert was used to reach temperatures between 0.05 and 4 K. Reciprocal space maps were recorded with four incoming energies $E_i$ = [4.5, 4.38, 3.5, 3.4] meV and 1 degree sample rotation steps. The field dependence was performed at a temperature $T$ = 50 mK and field $\mu_0 H$ = [0, 2, 4, 6, 8] T. Temperature dependence scans were recorded with a field $\mu_0 H$ = 8 T along the $b$-axis and 1.8 T along the $c$-axis and temperatures $T$ = [0.175, 0.35, 0.75, 1.58, 3.18] K and [0.1, 0.25, 0.5, 1, 2.3, 4] K respectively. Background maps were performed at the same field as the foreground and at a temperature $T$ = 45 or 50 K. Analysis of the data was performed with the MJOLNIR software.