Figure 27
Fig. 27: For the pure NpRu2Si2 sample the normalised (at T = 12.5 K) intensity of the first and third harmonics plotted as a function of temperature. The lines are fitted power law through the intensities of the first and the third harmonics. From these measurements one can extract also the wavevector and correlation length (position and width of the peaks, respectively) as a function of temperature.