Abstract
Quasielastic neutron scattering has been utilized to investigate the Griffiths phase induced by an axial magnetic field in at temperatures (H)⩽T⩽, where (H) is the transition temperature in an external magnetic field H. We present the temperature dependence of the integrated neutron-scattering intensity at fixed scattering vectors for various magnetic fields. On cooling below the antiferromagnetic short-range fluctuations decrease due to an increase of the volume fraction which is already antiferromagnetically ordered. A weighted average of the local contributions to the antiferromagnetic susceptibility quantitatively describes the scattering cross section. © 1996 The American Physical Society.
- Received 1 March 1996
DOI:https://doi.org/10.1103/PhysRevB.54.9015
©1996 American Physical Society