arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1602.00433cond-mat.mtrl-sci
收藏

使用纳米级磁电异质结构的高效热能收集

Efficient thermal energy harvesting using nanoscale magnetoelectric heterostructures

Seyyed Ruhollah Etesami, Jamal Berakdar

摘要:

具有铁电工作物质的热机械循环将热量转换成电能。如这里所示,磁电耦合铁电/铁磁复合材料(也称为多铁性)增加了新的功能,并允许在室温下通过利用热电效应进行有效的热能收集。借助于磁电耦合,外部电场和磁场可以操纵这些热机的操作。我们的理论预测是基于Landau-Khalatnikov-Tani方法(与Ginzburg-Landau-Devonshire势)的组合来模拟铁电动力学耦合到磁动力学。后者是通过电极化相关的Landau-Lifshitz-Gilbert方程处理的。执行一个适应奥尔森循环,我们表明,多铁性工作物质是潜在的更优于单一的铁电体,就利用热释电效应的热能收获而言。我们的建议不仅对低能耗设备,而且对冷却技术都有希望。

英文摘要:

Thermomechanical cycles with a ferroelectric working substance convert heat to electrical energy. As shown here, magnetoelectrically coupled ferroelectric/ferromangtic composites (also called multiferroics) add new functionalities and allow for an efficient thermal energy harvesting at room temperature by exploiting the pyroelectric effect. By virtue of the magnetoelectric coupling, external electric and magnetic fields can steer the operation of these heat engines. Our theoretical predictions are based on a combination of Landau-Khalatnikov-Tani approach (with a Ginzburg-Landau-Devonshire potential) to simulate the ferroelectric dynamics coupled to the magnetic dynamics. The latter is treated via the electric-polarization-dependent Landau-Lifshitz-Gilbert equation. Performing an adapted Olsen cycle we show that a multiferroic working substance is potentially much more superior to sole ferroelectrics, as far as thermal energy harvesting using pyroelectric effect is concerned. Our proposal holds promise not only for low-energy consuming devices but also for cooling technology.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑