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<p>The domain structure of ferroelectric materials plays a crucial role in their electrocaloric effect (ECE). When examining nanoscale ferroelectric materials, both geometric configurations and applied strain have significant impacts on the domain structures. By applying the Ginzburg–Landau theory, we have explored how various geometric configurations influence the ECE in BaTiO<sub>3</sub>/SrTiO<sub>3</sub> nanoscale ferroelectric composites. Our comprehensive analysis demonstrates that among different structural designs, the triangular lattice configuration exhibits the highest adiabatic temperature change (ATC) and the broadest temperature range for the ECE. This is followed by the honeycomb and square lattice structures. Furthermore, the influence of strain on the ECE of BaTiO<sub>3</sub>/SrTiO<sub>3</sub> composites with a triangular lattice configuration is also investigated. The strain-adiabatic temperature relationship, derived through simulation, underscores the significant role of strain in modifying the ECE. These insights offer valuable theoretical guidance for the development of efficient cooling devices.</p>

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Impact of geometric design and mechanical strain on the electrocaloric effect of nanoscale BaTiO3/SrTiO3 composites

  • 期刊论文

  • 发表日期：

    2025年2月8日

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  • Huaping Wu,
  • Yun Shen,
  • Jiaxi Chen,
  • Jie Wang,
  • Jun Zhu

摘要

The domain structure of ferroelectric materials plays a crucial role in their electrocaloric effect (ECE). When examining nanoscale ferroelectric materials, both geometric configurations and applied strain have significant impacts on the domain structures. By applying the Ginzburg–Landau theory, we have explored how various geometric configurations influence the ECE in BaTiO3/SrTiO3 nanoscale ferroelectric composites. Our comprehensive analysis demonstrates that among different structural designs, the triangular lattice configuration exhibits the highest adiabatic temperature change (ATC) and the broadest temperature range for the ECE. This is followed by the honeycomb and square lattice structures. Furthermore, the influence of strain on the ECE of BaTiO3/SrTiO3 composites with a triangular lattice configuration is also investigated. The strain-adiabatic temperature relationship, derived through simulation, underscores the significant role of strain in modifying the ECE. These insights offer valuable theoretical guidance for the development of efficient cooling devices.