Figure 6: Background subtracted INS spectra in SrRuO₃ observed at T=4 K on the HRC.

INS spectra are plotted at Q=0.175–0.5 Å⁻¹ at a step of 0.025 Å⁻¹, which are indicated with small solid circles with vertical bars presenting the statistical errors. Each spectrum was fitted with equation (2) by using the calculated resolution width W for Q≤0.3 Å⁻¹ and by parameterizing W for Q>0.3 Å⁻¹. The solid lines are the fitted curve to the spectrum, and the shaded areas are the spin wave components obtained by the fit. The determined spin wave peak positions are plotted with large circles. The different colours correspond to the different Q values. The red line indicates the spin wave dispersion with the Q² law determined for Q≤0.3 Å⁻¹.