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    题名: Magnetic order in the double pyrochlore Tb2Ru2O7
    作者: 陳洋元
    Chang,L J;M Prager;J Per?on;J Walter;E Jansen;Chen,Y Y;J S Gardner
    贡献者: 應物所
    日期: 2010.01
    上传时间: 2014-10-09 15:48:53 (UTC+8)
    摘要: Polycrystalline Tb2Ru2O7 has been studied using dc susceptibility, specific heat and neutron scattering techniques. The high temperature paramagnetic state is dominated by the single ion character of Tb3 + and very similar to that of the well-studied spin liquid Tb2Ti2O7. However, both the Ru4 + and Tb3 + sublattices order, at about 110?K and 3.5?K, respectively. Although the Tb sublattice does not fully order until 3.5?K, it is polarized in the presence of the internal field generated by the Ru4 + sublattice and possesses a significant moment at 7?K. Magnetic entropy measurements suggest that four levels exist in the first 30?K and inelastic neutron scattering investigations revealed two more levels at 10 and 14?meV. As the magnetic sublattices order, the excitations are perturbed from that measured in the paramagnetic state. These data are compared to data for other terbium based and double pyrochlores.
    關聯: Journal of Physics-Condensed Matter,22,076003
    数据类型: article
    显示于类别:[應用物理研究所 ] 期刊論文

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