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Soft x-ray resonant diffraction study of magnetic and orbital correlations in a manganite near half doping

Thomas, KJ; Hill, JP; Grenier, S; Kim, YJ; Abbamonte, P; Venema, L; Rusydi, A; (2004) Soft x-ray resonant diffraction study of magnetic and orbital correlations in a manganite near half doping. PHYS REV LETT , 92 (23) , Article 237204. 10.1103/PhysRevLett.92.237204. Green open access

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Abstract

We have utilized resonant x-ray diffraction at the Mn L-II,L-III edges in order to directly compare magnetic and orbital correlations in Pr0.6Ca0.4MnO3. Comparing the widths of the magnetic and orbital diffraction peaks, we find that the magnetic correlation length exceeds that of the orbital order by nearly a factor of 2. Furthermore, we observe a large (similar to3 eV) spectral weight shift between the magnetic and orbital resonant line shapes, which cannot be explained within the classic Goodenough picture of a charge-ordered ground state. To explain the shift, we calculate the orbital and magnetic resonant diffraction line shapes based on a relaxed charge-ordered model.

Type: Article
Title: Soft x-ray resonant diffraction study of magnetic and orbital correlations in a manganite near half doping
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.92.237204
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.92.237204
Language: English
Additional information: The American Physical Society
Keywords: SCATTERING, CHARGE
UCL classification: UCL > School of BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/125791
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