Enhanced electrocaloric effect in ferroelectric ceramics via defect dipole engineering.

ABSTRACT: The increasing demand for higher operating speeds and greater integration densities in electronic devices has made heat dissipation one of the most critical challenges for next-generation technologies. This challenge has driven extensive efforts aimed at achieving a giant electrocaloric effect in ferroelectrics for high-efficiency cooling. Here, we propose a defect dipole engineering strategy to manipulate the polarization behavior of ferroelectric ceramics, leading to superior electrocaloric effect. By incorporating Sm and Li ions, the (Sm_Bȧ-Li_Ba') defect dipoles enhance the polarizability of BaTiO₃. Simultaneously, these dipole defects increase the carrier activation energy, effectively mitigating the inherent trade-off between high breakdown strength an

SUBMITTER: Xiao W 

PROVIDER: S-EPMC12504552 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature