FERROIC AND STRUCTURAL INVESTIGATIONS IN RARE EARTH MODIFIED TbMnO_3 CERAMICS

摘要

In this work, high-dense TbMnO_3 ceramics were processed from nanocrystalline powders obtained through high-energy ball milling. The structure and microstructure of dense ceramics were studied by X-ray diffraction and scanning electron microscopy, and revealed high-dense and almost single-phased samples. The dielectric properties were investigated and showed two relaxation processes in the temperature range of 100 K to 300 K, and a third phenomenon at ～75 K that could be related to well-known magnetic transitions of TbMnO_3.