Abstract
The spin dynamics of geometrically frustrated pyrochlore antiferromagnets and have been investigated using muon spin relaxation. A dramatic slowing down of the moment fluctuations occurs as one approaches the spin freezing temperatures (=22 and 25 K, respectively) from above. Below there is a disordered magnetic state similar to that found in a spin glass but with a residual muon spin relaxation rate at low temperatures. These results show that there is a large density of states for magnetic excitations in these systems near zero energy. © 1996 The American Physical Society.
- Received 28 June 1996
DOI:https://doi.org/10.1103/PhysRevB.54.9019
©1996 American Physical Society