Quantum criticality of Ce${}_{1-x}$La${}_x$Ru${}_2$Si${}_2$ : the magnetically ordered phase

We report specific heat and neutron scattering experiments performed on the system Ce${}_{1-x}$La${}_x$Ru${}_2$Si${}_2$ on the magnetic side of its quantum critical phase diagram. The Kondo temperature does not vanish at the quantum phase transition and elastic scattering indicates a gradual localisation of the magnetism when $x$ increases in the ordered phase.