Entropy-Driven Reentrant Behavior in CMR Manganites
arXiv:cond-mat/0406504 · doi:10.1016/j.physb.2005.01.366
Abstract
We discuss the origin of the reentrant behaviors of insulating states above the Curie temperature of the colossal magnetoresistance manganites. We consider a system where charge ordering and ferromagnetism compete with each other. In the presence of randomness which pins charge order fluctuations, entropy-driven reentrant behaviors will appear, which explains the typical temperature dependence of the resistivity for CMR manganites.
2 pages, 1 figure, submitted to SCES'04