Lattice and superexchange effects in doped CMR manganites

2003/04/22 by Alexander Weiße, Alexander Weisse, Holger Fehske · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Electronic and Structural Properties of Oxides #Magnetic and transport properties of perovskites and related materials #cond-mat.str-el

paper · pdf · doi:10.1016/j.jmmm.2003.11.089

published as J. Magn. Magn. Mater. 272-276, 92 (2004) · 2 pages, 1 figure, submitted to ICM 2003

arxiv created 2003/04/22 · openalex publication_date 2004/03/24 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We report on the influence of the lattice degrees of freedom on charge, orbital and spin correlations in colossal magnetoresistance (CMR) manganites. For the weakly doped compounds we demonstrate that the electron-phonon coupling promotes the trapping of charge carriers, the disappearance of the orbital polaron pattern and the breakdown of ferromagnetism at the CMR transition. The role of different superexchange interactions is explored.

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• Microscopic modelling of doped manganites

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