2004/12/16 by S. B. Wilkins, Wilkins, S. B., N. Stojic +21
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #FOS: Physical sciences #High-pressure geophysics and materials #Magnetic and transport properties of perovskites and related materials #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0412435
Accepted for publication in Journal of Physics:Condensed Matter as a letter to the editor
openalex publication_date 2004/12/16 · arxiv created 2006/06/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Resonant soft x-ray diffraction has been used to probe the temperature dependent orbital and magnetic structure of \mathrmLaSr2Mn2O7. Previous crystallographic studies have shown that this material has almost no MnO6 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 LaSr2Mn2O7 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 Mn3+ ions with virtually no Jahn-Teller crystal field in addition to possible Mn3+ and Mn2+~like valence fluctuations.