Abstract
We report muon-spin-relaxation measurements on a series of compounds with composition where the net hole concentration is greater than 0.4. A magnetic transition is found in all the samples studied which occurs at a composition-dependent temperature . Below clear precession signals are observed in zero applied magnetic field, indicating the existence of at least short-range magnetic order on a time scale greater than s. Above the correlation times decrease by several orders of magnitude. The measurements of as a function of the net hole concentration extend the determination of Néel temperatures by previous neutron diffraction measurements to higher doping levels.
- Received 12 January 1996
DOI:https://doi.org/10.1103/PhysRevB.53.R14725
©1996 American Physical Society