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Phys. Rev. B 71, 212506 (2005) [4 pages]

High-resolution polarization analysis study of long-range magnetic order in cuprates

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Zahirul Islam*, D. Haskel, J. C. Lang, and G. Srajer
Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA

X. Liu and S. K. Sinha
Physics Department, University of San Diego, La Jolla, California 92093, USA

B. W. Veal
Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA

Received 6 December 2004; published 28 June 2005

We demonstrate how x-ray nonresonant magnetic scattering can be successfully used to study long-range-ordered spin-1/2 moments in cuprates. We studied the antiferromagnetic state characterized by qAF=(1/2,1/2,0), in high-quality single crystals of yttrium barium copper oxides, YBa2Cu3O6+x (x∼0.14 and ∼0.20). We found magnetic correlation lengths of at least ∼1000 Å in all directions. The polarization analysis and momentum dependence of magnetic Bragg peaks are consistent with the magnetic scattering cross section. No detectable magnetic scattering corresponding to (1/2,1/2,1/2) was observed.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.71.212506
DOI:
10.1103/PhysRevB.71.212506
PACS:
74.72.Bk, 75.25.+z, 75.30.−m, 61.10.Eq

*Email address: zahir@aps.anl.gov

 
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