  Nd0.05Ce0.95CoIn5 features a magnetic field-driven quantum phase transition
that separates two antiferromagnetic phases with an identical magnetic
structure inside the superconducting condensate. Using neutron diffraction we
demonstrate that the population of the two magnetic domains in the two phases
is affected differently by the rotation of the magnetic field in the tetragonal
basal plane. In the low-field SDW-phase the domain population is only weakly
affected while in the high-field Q-phase they undergo a sharp switch for fields
around the a-axis. Our results provide evidence that the anisotropic spin
susceptibility in both phases arises ultimately from spin-orbit interactions
but are qualitatively different in the two phases. This provides evidence that
the electronic structure is changed at the quantum phase transition, which
yields a modified coupling between magnetism and superconductivity in the
Q-phase.
