论文标题
通过可逆的域转换掺杂的铁电掺杂域通过可逆域切换来增强储能密度
Enhanced energy storage density by reversible domain switching in acceptor doped ferroelectrics
论文作者
论文摘要
典型的铁电气具有较大的自发性极化PS，但同时也具有较大的残留极化PR，导致了较低的储能密度。这种机制可以减少PR，同时需要维护PS，同时需要维护PS，以增强铁电的能量存储特性捏双磁滞回路。因此，具有较大PS和小PR的捏合环会导致储能密度增强。背后的物理学是缺陷引起的内部场，为域提供了恢复力，可以使域切换。通过时间依赖的金兹堡 - 兰道模拟，以及基于Batio $ _3 $的单晶和陶瓷的实验测量。该机制是一般的，可以应用于各种铁电器，尤其是环境友好的铁电剂。
Typical ferroelectrics possess a large spontaneous polarization Ps but simultaneously a large remnant polarization Pr as well, resulting in an inferior energy storage density.A mechanism that can reduce the Pr while maintain the Ps is demanded to enhance the energy storage property of ferroelectrics.In the present study, it is shown that after acceptor doping and aging treatment, the domain switching in ferroelectrics becomes reversible, giving rise to a pinched double hysteresis loop. The pinched loop with a large Ps and a small Pr thus results in an enhanced energy storage density. The physics behind is a defect induced internal field that provides a restoring force for the domains to switch back.The idea is demonstrated through a time-dependent Ginzburg-Landau simulation as well as experimental measurements in BaTiO$_3$ based single crystal and ceramics. The mechanism is general and can be applied to various ferroelectrics, especially the environment-friendly ones.
