The electrical resistivity has been measured in ceramic La2/3Ca1/3MnO3 as a function of temperature and magnetic field, including the vicinity of the Curie temperature TC≅267 K and down to low fields. We found that the field dependence of the magnetoresistance Δρ/ρ reveals peculiar features close to TC, unknown in conventional ferromagnets. Particularly, a finite linear response in field, besides the usual quadratic term, is found above TC. We propose that this behavior is due to the coexistence of two different types of magnetic fluctuations, related to itinerant and localized charge carriers.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.