Magnetic ordering in Gd2Sn2O7:: the archetypal Heisenberg pyrochlore antiferromagnet

被引：103
作者：
Wills, AS
Zhitomirsky, ME
Canals, B
Sanchez, JP
Bonville, P
de Réotier, PD
Yaouanc, A
机构：
[1] UCL, Dept Chem, London WC1H 0AJ, England
[2] UCL Royal Inst Great Britain, Davy Faraday Res Lab, London W1S 4BS, England
[3] Commissariat Energie Atom, DSM, DRFMC, SPSMS, F-38054 Grenoble, France
[4] CNRS, Lab Louis Neel, F-38042 Grenoble, France
[5] Commissariat Energie Atom, DSM, SPEC, F-91191 Gif Sur Yvette, France
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2006年 / 18卷 / 03期
关键词：
D O I：
10.1088/0953-8984/18/3/L02
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Low-temperature powder neutron diffraction measurements are performed in the ordered magnetic state of the pyrochlore anti ferro magnet 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 and of 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.
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页码：L37 / L42
页数：6
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