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Phys. Rev. Lett. 92, 056403 (2004) [4 pages]

Unraveling Orbital Ordering in La0.5Sr1.5MnO4

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S. S. Dhesi1,*, A. Mirone2, C. De Nadaï2, P. Ohresser3, P. Bencok2, N. B. Brookes2, P. Reutler4,5, A. Revcolevschi4, A. Tagliaferri6, O. Toulemonde7, and G. van der Laan8
1Diamond Light Source, Chilton, Didcot OX11 0QX, United Kingdom
2European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France
3LURE, Centre Université Paris Sud, BP 34, F-91898 Orsay, France
4Laboratoire de Physico-Chimie de l’Etat Solide, Université Paris Sud, F-91405 Orsay Cedex, France
5II Physikalisches Insitut, RWTH Aachen, Huykensweg, D-52056 Aachen, Germany
6INFM-Dipartimento di Fisica, Politecnico di Milano, piazza Leonardo da Vinci 32, 20133 Milano, Italy
7IPCMS, Université Louis Pasteur, CNRS, UMR7504, 23 rue de Loess, F-67034 Strasbourg, Cedex 2, France
8Magnetic Spectroscopy, Daresbury Laboratory, Warrington WA4 4AD, United Kingdom

Received 23 July 2003; published 5 February 2004

Orbital ordering (OO) in the layered perovskite La0.5Sr1.5MnO4 has been investigated using the enhanced sensitivity of soft x-ray resonant diffraction at the Mn L edges. The energy dependence of an OO diffraction peak over the L2,3 edges is compared to ligand-field calculations allowing a distinction between the influences of Jahn-Teller distortions and spin correlations. The energy dependence of the diffraction peak at the Mn L1 edge is remarkably different from that observed at the Mn K edge.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.056403
DOI:
10.1103/PhysRevLett.92.056403
PACS:
71.30.+h, 61.10.–i, 78.70.Ck

*Corresponding author. Electronic address: dhesi@diamond.ac.uk

 
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