Abstract
Inelastic neutron scattering has been used to measure the low-energy spin excitations in the ordered charge-stripe phase of with . Spin-wave-like excitations disperse away from the incommensurate magnetic superlattice points with a velocity of that in the compound. Incommensurate inelastic peaks remain well resolved up to at least twice the magnetic ordering temperature. Paramagnetic scattering from a sample, which has a Néel-ordered ground state, shows anomalies suggestive of incipient stripe correlations. Similarities between these results and measurements on superconducting cuprates are discussed.
- Received 2 December 1996
DOI:https://doi.org/10.1103/PhysRevLett.79.2133
©1997 American Physical Society