Abstract
We report neutron-scattering experiments that reveal coupled incommensurate peaks arising from magnetic as well as charge ordering at low temperatures (T≤100 K) in stoichiometric (δ=0.00) crystals. In contrast with the long-range ordering of holes and spins observed recently in , the correlations are short ranged in Sr-doped and the incommensurability ɛ is 0.25 and 0.12 for x=0.20 and 0.135, respectively. Based on our study and previous reports on , the modulation wave vector appears to be a sensitive function of net hole concentration, p=x+2δ. The magnetic correlation length increases with doping and the incommensurability follows the simple relationship ɛ≊p.
- Received 24 October 1994
DOI:https://doi.org/10.1103/PhysRevB.51.12742
©1995 American Physical Society