Fig. 4: Schematic of the magnetic interactions that determine the concurrence of Kondo effect and the incommensurate magnetic arrangement of the Cr atoms.

Schematic illustration of the mechanisms behind the Kondo effect, highlighting the magnetic arrangements and interactions in play and how they differ in the (a) antiferromagnetic regime, at temperatures bellow the Néel temperature and (b) paramagnetic regime at higher temperatures. It is within this physical picture that the dependence of the Kondo regime on the antiferromagnetic transition becomes clear: as only at lower temperatures there is no effective magnetic field at the impurities sites and the impurity Kondo scaterring can be observed. Simplification of the magnetic structure model, it does not reflect the cycloidal ordering discussed in Baenitz et al.¹¹ which is not important in our context.