Cu $_2$ Fe $_2$ Ge PDMATHAAB O $_{13}$中自旋二聚体介导的间接磁相互作用
Indirect magnetic interaction mediated by spin dimer in Cu$_2$Fe$_2$Ge$_4$O$_{13}$
摘要:
Cu $_2$ Fe $_2$ Ge $_4$ O $_{13}$是一种双组分化合物,由具有不同能量标度的Cu二聚体和Fe链组成。利用高能量分辨率的非弹性中子散射技术,我们观察到铜二聚体的间接铁-铁交换耦合。得到的有效间接相互作用和相关超交换相互作用的参数与半静态估计值一致。这种一致性表明,铜二聚体在间接磁相互作用中起着介电介质的作用。
英文摘要:
Cu$_2$Fe$_2$Ge$_4$O$_{13}$ is a bicomponent compound that consists of Cu dimers and Fe chains with separate energy scale. By inelastic neutron scattering technique with high-energy resolution we observed the indirect Fe - Fe exchange coupling by way of the Cu dimers. The obtained parameters of the effective indirect interaction and related superexchange interactions are consistent with those estimated semi-statically. The consistency reveals that the Cu dimers play the role of nonmagnetic media in the indirect magnetic interaction.
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