M. Ikebe et al., An evidence for strong phonon-conduction electron interaction from thermaltransport anomaly in Nd0.50Sr0.50MnO3, PHYSICA B, 281, 2000, pp. 496-497
The thermal conductivity kappa(T) has been measured for Nd0.50Sr0.50MnO3 an
d La0.50Sr0.50MnO3. In these compounds, the ferromagnetic phase becomes uns
table against the antiferromagnetic order at lower temperatures. kappa(T) o
f both samples shows an anomalous reduction just below T-N and a shallow di
p at around T-c. Analyses have revealed that the phonon component kappa(ph)
of Nd0.50Sr0.50MnO3 is actually enhanced below T-N, providing a direct evi
dence for the very strong phonon-charge carrier interaction in this compoun
d. (C) 2000 Elsevier Science B.V. All rights reserved.