Non-linear dielectric properties of BiFeO3 ceramics

The nonlinear dielectric properties of BiFeO3 ceramics as a function of temperature were investigated. The present results demonstrate a high dielectric tunability in quite low range of the bias electric fields over a broad temperature interval around the room temperature. The non-linear permittivity-field response results from multiple contributions, whose weights are different at various temperatures and in different field ranges. (C) 2011 American Institute of Physics. [doi:10.1063/1.3653471]