Evidence for a Crossover from Multiple Trapping to Percolation in the High-Temperature Electrical Conductivity of Mn-doped LaCroO₃

Author

Ryne P. Raffaelle
Harlan U. Anderson, Missouri University of Science and TechnologyFollow
Don M. Sparlin, Missouri University of Science and TechnologyFollow
Paul Ernest Parris, Missouri University of Science and TechnologyFollow

Abstract

We explain the deep electrical conductivity minimum near x=0.05 in the perovskite-type ceramic LaCr_1-xMn_xO₃ as a crossover between two different regimes of hopping conduction. At low Mn concentrations the diffusion of small polarons among Cr ions is limited by multiple trapping at energetically lower Mn sites. At higher concentrations a percolating path of Mn sites forms and direct transport between Mn ions dominates the conduction process.

Recommended Citation

R. P. Raffaelle et al., "Evidence for a Crossover from Multiple Trapping to Percolation in the High-Temperature Electrical Conductivity of Mn-doped LaCroO₃," Physical Review Letters, vol. 65, no. 11, pp. 1383 - 1386, American Physical Society (APS), Sep 1990.

The definitive version is available at https://doi.org/10.1103/PhysRevLett.65.1383

Department(s)

Materials Science and Engineering

Second Department

Physics

International Standard Serial Number (ISSN)

0031-9007

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 1990 American Physical Society (APS), All rights reserved.

Publication Date

01 Sep 1990