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Proceedings Paper

Soft x-ray resonant diffraction in transition metal oxides
Author(s): K. Jessica Thomas; S. Grenier; J. P. Hill; F. C. Chou; Y. Tomioka; Y. Tokura; P. Abbamonte
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Paper Abstract

We discuss recent soft x-ray resonant diffraction studies of magnetic and structural correlations in manganites and cobaltates. In half-doped manganites, the resonant enhancement of super-lattice diffraction peaks resulting from orbital and magnetic order is utilized to make a direct comparison of orbital and spin correlations. The main finding is that the correlation length associated with magnetic order exceeds that of the orbital order by of order a factor of two--a result which appears at odds with orbitally driven magnetic exchange pathways. Similar resonant diffraction measurements at the Co L-edge were performed to study the oxygen-doped cobaltate Bi2Sr2CoO6+δ, in which we find a surprising incommensurate antiferromagnetic order.

Paper Details

Date Published: 19 September 2005
PDF: 9 pages
Proc. SPIE 5932, Strongly Correlated Electron Materials: Physics and Nanoengineering, 59322A (19 September 2005); doi: 10.1117/12.624677
Show Author Affiliations
K. Jessica Thomas, Brookhaven National Lab. (United States)
S. Grenier, Brookhaven National Lab. (United States)
J. P. Hill, Brookhaven National Lab. (United States)
F. C. Chou, Massachusetts Institute of Technology (United States)
National Taiwan Univ. (Taiwan)
Y. Tomioka, Correlated Electron Research Ctr., AIST (Japan)
Y. Tokura, Correlated Electron Research Ctr., AIST (Japan)
Univ. of Tokyo (Japan)
Japan Science and Technology Corp. (Japan)
P. Abbamonte, Brookhaven National Lab. (United States)

Published in SPIE Proceedings Vol. 5932:
Strongly Correlated Electron Materials: Physics and Nanoengineering
Ivan Bozovic; Davor Pavuna, Editor(s)

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