  Inelastic Neutron Scattering (INS) data in LSCO, YBCO and Bi2212 are
discussed. In the literature, the INS spectra remain far from being
comprehensively understood. We show that local (Q-integrated) susceptibility
data and the energy dependence of the spin susceptibility at antiferromagnetic
vector, Q = (p,p), can be interpreted by using the phase diagram for hole-doped
cuprates. We analyze also the origin of the resonant peak which relates to the
order parameter for long-range phase coherence in hole-doped cuprates. Thus, we
present an interpretation of neutron data in LSCO, YBCO and Bi2212 published so
far.
