Origin of a spin-state polaron in lightly hole doped LaCoO3

A. Alfonsov, E. Vavilova, V. Kataev, B. Büchner, A. Podlesnyak, M. Russina, A. Furrer, Strässle Th Strässle, E. Pomjakushina, K. Conder, I. Khomskii

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Abstract

We performed electron spin and nuclear magnetic resonance and inelastic neutron scattering measurements of a single crystal of lightly hole-doped La1-xSrxCoO3, x ∼ 0.002 in order to establish the origin of a surprisingly strong magnetization due to a very small Sr doping. The data provide experimental evidence for the creation at low temperatures of extended spin clusters with a large spin multiplicity. We argue that the doped hole couples ferromagnetically seven magnetic Co ions yielding a spin-state polaron with a huge local magnetic moment with a strong orbital contribution.

Original languageEnglish
Article number042003
JournalJournal of Physics: Conference Series
Volume150
Issue number4
DOIs
StatePublished - 2009
Externally publishedYes

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