Evidence of Orbital Ordering in Jahn-Teller Undistorted LaSr$_{2}$Mn$_{2}$O$_{7}$

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dc.creatorWilkins, S. B.
dc.creatorStojic, N.
dc.creatorBeale, T. A. W.
dc.creatorBinggeli, N.
dc.creatorBencok, P.
dc.creatorStanescu, S.
dc.creatorMitchell, J. F.
dc.creatorAbbamonte, P.
dc.creatorHatton, P. D.
dc.creatorAltarelli, M.
dc.date2004-12-16
dc.date2006-06-03
dc.date.accessioned2026-07-07T06:37:25Z
dc.date.available2026-07-07T06:37:25Z
dc.descriptionResonant soft x-ray diffraction has been used to probe the temperature dependent orbital and magnetic structure of $\mathrm{LaSr_{2}Mn_{2}O_7}$. Previous crystallographic studies have shown that this material has almost no MnO$_{6}$ oxygen displacement due to Jahn-Teller distortions at low temperatures. Within the low-temperature A-type antiferromagnetic phase, we found strong intensity at the $({1/4},{1/4},0)$ orbital and $LaSr_{2}Mn_{2}O_7$ magnetic reflections. This shows that even in the near absence of Jahn-Teller distortion, this compound is strongly orbitally ordered. A fit to the Mn $L$-edge resonance spectra demonstrates the presence of orbital ordering of the Mn$^{3+}$ ions with virtually no Jahn-Teller crystal field in addition to possible Mn$^{3+}$ and Mn$^{2+}$~like valence fluctuations.
dc.descriptionAccepted for publication in Journal of Physics:Condensed Matter as a letter to the editor
dc.identifierhttps://arxiv.org/abs/cond-mat/0412435
dc.identifierhttp://arxiv.org/abs/cond-mat/0412435
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/100384
dc.subjectStrongly Correlated Electrons
dc.titleEvidence of Orbital Ordering in Jahn-Teller Undistorted LaSr$_{2}$Mn$_{2}$O$_{7}$
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