A S Wills et al 2006 J. Phys.: Condens. Matter 18 L37 doi:10.1088/0953-8984/18/3/L02
A S Wills1,2, M E Zhitomirsky3, B Canals4, J P Sanchez3, P Bonville5, P Dalmas de Réotier3 and A Yaouanc3
Show affiliationsLow-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 the magnetic structure of Gd2Sn2O7 andof nominally analogous Gd2Ti2O7 is found to be determined by a specific type of third-neighbour superexchange interaction on the pyrochlore lattice between spins across empty hexagons.
Issue 3 (25 January 2006)
Received 18 November 2005
Published 6 January 2006
A S Wills et al 2006 J. Phys.: Condens. Matter 18 L37
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