Mesoscopic thermodynamics of an inhomogeneous colossal-magnetoresistive phase

R. D. Merithew, M. B. Weissman, F. M. Hess, P. Spradling, E. R. Nowak, J. O’donnell, J. N. Eckstein, Y. Tokura, Y. Tomioka

Research output: Contribution to journalArticlepeer-review

Abstract

Equilibrium conductivity fluctuations of mesoscopic domains are found in film and bulk single-crystal manganite colossal magnetoresistive material. Temperature and field dependences of the Boltzmann factors for a collection of two-state fluctuators give measures of the magnetic moment and entropy differences between the states, and of the fluctuator volumes. The large resistance step size implies dramatic current inhomogeneities. Occasional anomalous temperature dependences indicate that the film inhomogeneous phase is stabilized by a repulsive interaction between conducting regions.

Original languageEnglish (US)
Pages (from-to)3442-3445
Number of pages4
JournalPhysical review letters
Volume84
Issue number15
DOIs
StatePublished - 2000

ASJC Scopus subject areas

  • General Physics and Astronomy

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