Abstract
We report on the spin dynamics in antiferromagnetic ( K) chromium oxide -CaCrO, which has been proposed recently as a good experimental realization of a spin- strongly frustrated zigzag ladder. Inelastic neutron-scattering experiments evidence unconventional magnetic excitations, reminiscent of a spin-(pseudo)gap behavior above . We interpret this result as related to strong one-dimensional quantum fluctuations over a broad temperature range extending up to 80 K. Below , spin dynamics are compatible with a model of weakly ferromagnetically coupled frustrated ladders.
- Received 17 May 2011
DOI:https://doi.org/10.1103/PhysRevB.84.020402
©2011 American Physical Society