Exchange bias effect in Tb0.4Dy0.6MnO3

Polycrystalline Tb1−xDyxMnO3 (x=0.0, 0.3, 0.5, 0.6, and 0.8) were prepared by the traditional solid-phase reaction method. The XRD result shows that Tb0.4Dy0.6MnO3 may have a different structure; it has two diffraction peaks near 33.30° while other samples have three diffraction peaks at the same diffraction angle. The magnetic properties of Tb0.4Dy0.6MnO3 are also different from those of the other samples. An exchange-bias effect was observed at 5 K with the field cooling of ±5 T for Tb0.4Dy0.6MnO3. The dc and ac magnetizations as well as magnetic hysteresis measurements suggest the coexistence of antiferromagnet and ferromagnet characteristics which originate from the interplay of 3d and 4f electrons at the rare-earth sublattice and low temperature in Tb0.4Dy0.6MnO3.