Dielectric properties of PMN+2%Li2O at low frequencies

The reported study is focused on effects of the admixture of lithium (2% Li2O) on the low‐frequency dielectric response in lead magnesium niobate ceramics over the 100 ‐300 K range of temperature. The obtained results reveal an essential thermal broadening of the ε′(ν) spectra specific to relaxor ferroelectrics. Dispersion Δε′ = ε′1Hz‐ε′1kHz and values of ε′′(ν) in lead magnesium niobate ceramics containing Li are well described by the Cole‐Cole equation at temperatures below the ε′(T) maximum. Based on the analysis of the experimental data admixture of lithium is suggested to promote formation of domains in lead magnesium niobate ceramics (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)