Heat conduction and magnetic phase behavior in electron-doped Ca1-xLaxMnO3 (0≤x≤0.2)

J. L. Cohn, J. J. Neumeier

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33 Scopus citations

Abstract

Measurements of thermal conductivity (K) vs temperature are reported for a series of Ca1-xLaxMnO3(0≤x≤0.2) specimens. For the undoped (x = 0), G-type antiferromagnetic compound a large enhancement of κ below the Neél temperature (TN∼125 K) indicates a strong coupling of heat-carrying phonons to the spin system. This enhancement exhibits a nonmonotonic behavior with increasing x and correlates remarkably well with the small ferromagnetic component of the magnetization reported previously [Neumeier and Cohn, Phys. Rev. B 61 14319 (2000)]. Magnetoelastic polaron formation appears to underly the behavior of K and the magnetization at x⊖0.02.

Original languageEnglish (US)
Article number100404
Pages (from-to)1004041-1004044
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number10
DOIs
StatePublished - Sep 1 2002

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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