  We have recently used inelastic neutron scattering to measure the magnetic
excitation spectrum of La(1.875)Ba(0.125)CuO(4) up to 200 meV. This particular
cuprate is of interest because it exhibits static charge and spin stripe order.
The observed spectrum is remarkably similar to that found in superconducting
YBa(2)Cu(3)O(6+x) and La(2-x)Sr(x)CuO(4); the main differences are associated
with the spin gap. We suggest that essentially all observed features of the
magnetic scattering from cuprate superconductors can be described by a
universal magnetic excitation spectrum multiplied by a spin gap function with a
material-dependent spin-gap energy.
