Magnetic ordering in Gd2Sn2O7: the archetypal Heisenberg pyrochlore antiferromagnet

A. S. Wills; M. E. Zhitomirsky; B. Canals; J. P. Sanchez; P. Bonville; P. Dalmas de Reotier; A. Yaouanc

doi:10.1088/0953-8984/18/3/L02

Magnetic ordering in Gd2Sn2O7: the archetypal Heisenberg pyrochlore antiferromagnet

Materials Science 2007-05-23 v1 Strongly Correlated Electrons

Authors: A. S. Wills , M. E. Zhitomirsky , B. Canals , J. P. Sanchez , P. Bonville , P. Dalmas de Reotier , A. Yaouanc

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Abstract

Low-temperature powder neutron diffraction measurements are performed in the ordered magnetic state of the pyrochlore antiferromagnet Gd2Sn2O7. Symmetry analysis of the diffraction data indicates that this compound has the ground state predicted theoretically for a Heisenberg pyrochlore antiferromagnet with dipolar interactions. The difference in magnetic structures of Gd2Sn2O7 and of nominally analogous Gd2Ti2O7 is found to be determined by a specific type of third-neighbor superexchange interaction on the pyrochlore lattice between spins across empty hexagons.

Keywords

neutron diffraction magnetic ordering Heisenberg antiferromagnet pyrochlore lattice superexchange interaction

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@article{arxiv.cond-mat/0602138,
  title  = {Magnetic ordering in Gd2Sn2O7: the archetypal Heisenberg pyrochlore antiferromagnet},
  author = {A. S. Wills and M. E. Zhitomirsky and B. Canals and J. P. Sanchez and P. Bonville and P. Dalmas de Reotier and A. Yaouanc},
  journal= {arXiv preprint arXiv:cond-mat/0602138},
  year   = {2007}
}

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6 pages

Magnetic ordering in Gd2Sn2O7: the archetypal Heisenberg pyrochlore antiferromagnet

Abstract

Keywords

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