Multiferroic properties of four-layered Bi4.25La0.75Fe0.5Co0.5Ti3O15 ceramics were carefully investigated. X-ray diffraction and high resolution transmission electron microscopy analyses indicate that the as-prepared sample is almost free from secondary phases, and magnetization measurements confirm a ferromagnetic transition similar to 483 K. At room temperature (RT), the sample shows a typical ferromagnetism with a remnant magnetization (2M(r)) of similar to 51.2 m emu/g, and a good ferroelectric hysteresis with a remnant polarization (2P(r)) of similar to 15.4 mu C/cm(2). More importantly, an obvious magneto-dielectric (MD) effect has been found under a low magnetic field of 1 T at RT with a maximum of magneto-dielectric constant of similar to 10.5%.

--

Yangzhou University