Structure and physical properties of La(0.1)Bi(0.9-x)Eu(x)FeO(3) compounds

In this work, La 0.1 Bi 0.9- x Eu x FeO 3 compounds were prepared by solid-state reaction. The phase relation at room temperature was investigated by X-ray powder diffraction. A rhombohedral ( R 3 c ) phase exists for x ≤0.05; for 0.08≤ x ≤0.12 a pseudo- R 3 c phase is found; for x ≥0.15 it is an orthorhombic (Pbnm) phase, while the distortion of the Pbnm phase was observed for the composition range of 0.15≤ x ≤0.20. Magnetic measurements indicate that weak ferromagnetism exists in all the compounds, and for the compounds with x ≤0.20 the magnetic moment has the maximum value at x =0.12. The composition dependence of dielectric constant was investigated at room temperature. The relationship between the structure and the physical properties was discussed.