Abstract
The elastic properties of are anomalous, particularly in the paramagnetic phase, where values of the longitudinal sound velocity at , in the zero-sound regime, are more than 50% larger than those from ultrasound experiments at . Such a behavior, indicative of coupling to relaxation processes, is similar to that of liquids and soft viscoelastic matter, but quite unusual for a hard solid. These results suggest that the physics of phase separation in manganites is more complex than that of a stationary mixture of competing phases.
- Received 6 February 2006
DOI:https://doi.org/10.1103/PhysRevB.74.012405
©2006 American Physical Society