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MAGNETIC FLUCTUATIONS AND SHORT-RANGE ORDER IN STRONGLY FRUSTRATED SRCR8-XGA4+XO19 (ABSTRACT)
被引：6
作者：
BROHOLM, C
ESPINOSA, GP
COOPER, AS
AEPPLI, G
机构：
[1] AT and T Bell Laboratories, Murray Hill
关键词：
D O I：
10.1063/1.346108
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In SrCr8-xGa4+xO19 antiferromagnetically interacting (θCW≊-500 K; θCW is the Curie-Weiss temperature) Cr ions occupy a two-dimensional Kagomé lattice. The ground state of Ising spins on this lattice is known to be disordered and to have a higher ground-state entropy than the triangular lattice. We have studied the magnetic fluctuations and short-range order in this highly correlated but disordered system by magnetic neutron scattering. We find (3)1/2×(3)1/2 short-range order (ξ≊6 Å) in the instantaneous correlations for T≲50 K. The magnetic fluctuation rate decreases with temperature and static correlations develop below Tg =8 K. The ground state, however, remains strongly fluctuating.
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页码：5799 / 5799
页数：1
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