Title: Magnetoelectric coupling in the pyrochlore ruthenate Gd2Ru2O7
Authors: Takuma, Okamura; Ryuji, Okazaki; Hiroki, Taniguchi; Yukio, Yasu; Ichiro, Terasaki
Abstract: We have prepared polycrystalline samples of Gd2Ru2O7, and have measured the dielectric constant, magnetization
and magnetostriction in external fields from 0 to 7 T below 15 K. We find that the dielectric constant of Gd2Ru2O7
significantly changes with external fields, and reveal a finite magnetoelectric coupling in this oxide. Using a simple
model in which the spins on the Gd ions feel an internal magnetic field of 7 T from the Ru clusters, we have explained
magnetization and magnetoelectric effects qualitatively.
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