Magneto-Elastic Polarons in CMR Perovskites

Author: Roder H.  

Publisher: Springer Publishing Company

ISSN: 0896-1107

Source: Journal of Superconductivity: Incorporating Novel Magnetism, Vol.12, Iss.1, 1999-02, pp. : 303-305

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Abstract

In this presentation I focus on the ferro- to paramagnetic transition in the manganese perovskites. I present a set of simple approximations which couple the relevant electronic degrees of freedom, the double exchange model, to local Jahn–Teller like lattice distortions. In a simplistic description, I show how this coupling controls the magnetism in the narrow band manganates, and how their critical behavior is influenced by the quasilocalization of Jahn–Teller polarons.