Continuous pyroelectric energy generation with cyclic magnetic phase transition for low-grade thermal energy harvesting

•Typical thermoelectric devices show low conversion efficiency of thermoelectrics at low temperatures and easy thermal equilibration.•A thermo-magneto-pyroelectric energy generator (TMPyEG), which is a combination of a thermo-magneto-electric generator and a pyroelectric generator, was developed to continuously harvest waste heat and convert it into electric outputs.•The crest factor was migrated by incorporating piezoelectric material by filling the energy gaps between pyroelectric energy output.•TMPyEG outperforms conventional thermoelectric energy harvesting devices, which rely on sole energy conversion mechanisms.