Figure 4
Evolution of the total strain (bold line) in the range 28–343 K and of the most significant anharmonic parameters (circles represent U2222, averaged over Fe and Co, crosses U111 averaged over O1 and C1) refined in the range 28–295 K (higher temperatures are excluded due to the highly unstable refinement of these parameters which caused inconsistent results). For comparative purposes, all quantities are normalized with respect to the 295 K point. |