20.500.12556/DiRROS-22646 Large high-temperature piezoelectric response of lead-free ▫$BiFeO_3–BaTiO_3$▫ originating from relaxor disorder To date, no piezoelectric material system has been developed that would match the piezoelectric performance of the group of lead-based relaxor ferroelectrics, such as Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN–PT). In the quest to f ind alternatives, continuous efforts have been made to understand the complex microscopic origins leading to the large macroscopic piezoelectric response of PMN–PT and similar lead-based perovskites with relaxor characteristics. Despite significant advances, it is still unclear whether those concepts can be efficiently used to develop lead-free relaxor ferroelectric alternatives. Here, a large piezoelectric response of BiFeO3–BaTiO3 (BFO–BTO) ceramics is reported, characterized by a d33 coefficient of 1200 pmV−1 measured at 325 °C, 1 kV cm−1 of driving field and 90 Hz of field frequency. While composed of multiple contributions, the large response is found to be dominated by a strongly nonlinear and hysteretic process, likely associated with the dynamics of hierarchically arranged nanodomain walls, thus resembling the mechanisms operating in lead-based relaxor materials. Although the response is triggered upon elevated thermal energy, the results provide valuable information about the microscopic behavior that can be potentially used to tailor the response of lead-free relaxor ferroelectrics and bring them closer to the highly performant lead-based perovskites piezoelektrika materiali true false true Wiley ZDA Angleški jezik Slovenski jezik © 2025 The Author(s) Neznano 2025-06-13 12:26:36 2025-06-13 12:26:37 2025-10-24 03:51:52 0000-00-00 00:00:00 2025 0 0 str. 1-15 Art. 2502379 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2025-02-25 0000-00-00 2025-06-09 544.5/.6 1613-6829 10.1002/smll.202502379 238924547 RAZ_Iacomini_Antonio_2025.pdf RAZ_Iacomini_Antonio_2025.pdf 1 5C8FE27A9FF6C6F980891F497D8F0242 eaf9d7158c68eb6d6a439d17cb3506d5fce2f5fffaa3e800224e5f9227d18067 b875b6a0-4831-11f0-bf0a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=32819 Institut Jožef Stefan 0 0 0