TY - JOUR
T1 - Anomalous first-to-zero sound crossover in La1-x Cax Mn O3
AU - Ren, Yuhang
AU - Lüpke, G.
AU - Hu, Yufeng
AU - Li, Qi
AU - Hong, C. S.
AU - Hur, N. H.
AU - Merlin, R.
PY - 2006
Y1 - 2006
N2 - The elastic properties of La1-x Cax Mn O3 (x≈1 3) are anomalous, particularly in the paramagnetic phase, where values of the longitudinal sound velocity at ∼ 1010 Hz, in the zero-sound regime, are more than 50% larger than those from ultrasound experiments at 103 - 106 Hz. 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.
AB - The elastic properties of La1-x Cax Mn O3 (x≈1 3) are anomalous, particularly in the paramagnetic phase, where values of the longitudinal sound velocity at ∼ 1010 Hz, in the zero-sound regime, are more than 50% larger than those from ultrasound experiments at 103 - 106 Hz. 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.
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U2 - 10.1103/PhysRevB.74.012405
DO - 10.1103/PhysRevB.74.012405
M3 - Article
AN - SCOPUS:33746054157
SN - 1098-0121
VL - 74
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 1
M1 - 012405
ER -