Department of Chemistry, University of Winnipeg, Winnipeg, MB, R3B 2E9, Canada.
J Phys Condens Matter. 2011 Sep 28;23(38):382201. doi: 10.1088/0953-8984/23/38/382201. Epub 2011 Sep 2.
The low temperature behaviour of powder Er2Sn2O7 samples has been studied by magnetic susceptibility, heat capacity, and neutron scattering experiments. We report here the absence of magnetic ordering down to 100 mK. Anomalies in the heat capacity can be accounted for through an analysis of the crystal field spectrum observed by inelastic neutron scattering spectroscopy. These new measurements on Er2Sn2O7 suggest a new lower bound for the frustration index of f = |Θ(CW)|/T(N) = 14/0.1 = 140, placing this compound into a highly frustrated regime.
我们通过磁化率、比热和中子散射实验研究了粉末 Er2Sn2O7 样品的低温行为。我们在此报告，在 100mK 以下没有观察到磁有序。通过分析弹性中子散射光谱观察到的晶场谱，可以解释比热的反常。这些关于 Er2Sn2O7 的新测量结果表明，f = |Θ(CW)|/T(N) = 14/0.1 = 140 的受挫指数有一个新的下限，将该化合物置于一个高度受挫的区域。
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