Comprehensive study by neutron scattering technique in a weakly coupled quantum dimers and classical chains compound Cu
2Fe
2Ge
4O
13is reported. Thorough survey of the spin dynamics in four dimensional
k-E space by triple axis spectrometer reveals that the dimer behaves as a media that transfers exchange integrals from one Fe spin to another. The obtained effective parameter of the indirect magnetic interaction is totally consistent with that estimated by static measurements including neutron diffraction and magnetic susceptibility measurement.
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