论文标题
高功率密度收集设备基于CO/PT磁性多层的异常效应
High power density energy harvesting devices based on the anomalous Nernst effect of Co/Pt magnetic multilayers
论文作者
论文摘要
异常的Nernst效应（ANE）是一种热能现象，具有潜在的热能收集。尽管最近的许多作品研究了提高材料系数的方法，但相对较少的努力致力于增加效果所提供的功率。在这里，我们演示了一种具有ANE产生的记录功率密度的纳米制动器。为此，我们制造了微米大小的设备，其中热梯度比传统的宏观设备高三个数量级。此外，我们使用CO/PT多层，该系统是以高ANE热电器（〜1 microv/k），低电阻率和垂直磁各向异性为特征的系统。这些创新使我们能够获得约13 W/cm3的电源密度。我们认为，这种设计可能会发现在收获浪费的能量中的用途，例如电子设备。
The anomalous Nernst effect (ANE) is a thermomagnetic phenomenon with potential applications in thermal energy harvesting. While many recent works studied the approaches to increase the ANE coefficient of materials, relatively little effort was devoted to increasing the power supplied by the effect. Here we demonstrate a nanofabricated device with record power density generated by the ANE. To accomplish this, we fabricate micrometer-sized devices in which the thermal gradient is three orders of magnitude higher than conventional macroscopic devices. In addition, we use Co/Pt multilayers, a system characterized by a high ANE thermopower (~1 microV/K), low electrical resistivity, and perpendicular magnetic anisotropy. These innovations allow us to obtain power densities of around 13 W/cm3. We believe that this design may find uses in harvesting wasted energy in e.g. electronic devices.
