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

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 experiment...

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Published inJournal of physics. Conference series Vol. 150; no. 4; p. 042003
Main Authors Alfonsov, A, Vavilova, E, Kataev, V, Büchner, B, Podlesnyak, A, Russina, M, Furrer, A, Strässle, Th, Pomjakushina, E, Conder, K, Khomskii, D I
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.03.2009
Subjects
Electron spin
Ferromagnetism
Inelastic scattering
Low temperature
Magnetic moments
Neutron scattering
Neutrons
NMR
Nuclear magnetic resonance
Physics
Polarons
Resonance scattering
Single crystals
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Summary: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.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/150/4/042003