A novel four-layer Bi5FeTi3O15(BFTo) compound was synthesized via sintering the mixture of Fe2O3, Bi2O3 oxides and already-prepared Bi4Ti3O12 powders. At room temperature, the remnant polarization (2P(r)) and the coercive field (2E(c)) of Bi5FeTi3O15 samples were about 11.8 mu C/cm(2) and 270 kV/cm, respectively. The BFTO samples show a weak ferromagnetism with M-r approximate to 1.36 x 10(-6) emu/g. A sharp dielectric peak was found, showing that the arrangement Of iron ions in each crystal unit maybe relatively in order. Two peaks were found in the tan delta - T Curves. The peak at lower temperature (similar to 400 degrees C) behaves relaxation characteristic, with the activation energy (H) of about 1.62 eV and the upper peak is frequency independent.

multiferroics; ferroelectrics; dielectric response

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