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Indirect magnetic interaction mediated by a spin dimer in Cu$$_2$$Fe$$_2$$Ge$$_4$$O$$_{13}$$

Masuda, Takatsugu*; Kakurai, Kazuhisa; Matsuda, Masaaki; Kaneko, Koji   ; Metoki, Naoto   

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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Category:Materials Science, Multidisciplinary

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