  It is shown by detailed inelastic neutron scattering experiments that the
gapped collective magnetic excitation of the unconventional superconductor
CeCoIn$_{5}$, the spin resonance mode, is incommensurate and that the
corresponding fluctuations are of Ising nature. The incommensurate peak
position of these fluctuations corresponds to the propagation vector of the
adjacent field induced static magnetic ordered phase, the so-called Q-phase.
Furthermore, the direction of the magnetic moment fluctuations is also the
direction of the ordered magnetic moments of the Q-phase. Hence the resonance
mode and the Q-phase share the same symmetry and this strongly supports a
scenario where the static order is realized by a condensation of the magnetic
excitation.
