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Article Dans Une Revue Nature Materials Année : 2007

Surface effects on the orbital order in the single layered manganite La0.5 Sr1.5 MnO4

Résumé

We report the first observation of 'orbital truncation rods' - the scattering arising from the termination of bulk orbital order at the surface of a crystal. The x-ray measurements, performed on a cleaved, single-layered perovskite, La0.5 Sr1.5 MnO4 , reveal that while the crystallographic surface is atomically smooth, the orbital 'surface' is much rougher, with an r.m.s. deviation from the average 'surface' of ∼7 A. The temperature dependence of this scattering shows evidence of a surface-induced second order transition.
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hal-00153150 , version 1 (08-06-2007)

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Yusuke Wakabayashi, M. H. Upton, Stéphane Grenier, J.P. Hill, C. S. Nelson, et al.. Surface effects on the orbital order in the single layered manganite La0.5 Sr1.5 MnO4. Nature Materials, 2007, 6 (12), pp.972-976. ⟨10.1038/nmat2061⟩. ⟨hal-00153150⟩

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