Owing to the increasing interest and significance of the internet of things (IoT) in the technological world, the demand of efficient wireless sensor networks (WSN) is growing rapidly. In order to achieve the sustainable WSN, it is vital to develop passive sensors as well as standalone power generators which can harvest energy from the available stray sources.
Recently, we developed a Sm-doped Pb(Mg1/3Nb2/3)-PbTiO3/NiFe2O4 bilayer composite to operate under converse magnetoelectric mode. The device exhibited a converse magnetoelectric (CME) coefficient, which is at least an order of magnitude higher than any previously reported value for polycrystalline ferrite-based laminate composites. The large CME coefficient was attributed to the high transverse piezoelectric coefficient of the piezoelectric phase. The laminate composite also exhibited excellent current to voltage conversion performance and magnetic switching characteristics.
Schematic of the magnetoelectric bilayer laminate composite and its coupling coeffieint as a function of frequency.
