In ceramics of doped with 3 at. % of Mn the dielectric response is dominated by the polydispersive behavior of centered polar regions, whereas the magnetic and magnetoelectric (ME) behaviors reflect an intimate coupling between -site substituted ions and minute amounts of precipitates mediated by the polar host material. This becomes apparent by the common onset at of the ordering of ferrimagnetic and of a spin cluster glass, which is characterized by memory and rejuvenation effects. The composite magnetic system exposed to external magnetic and electric dc fields shows large third order ME susceptibility with a sharp anomaly at and dependence as .
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