Murata Masayuki, Nagase Kazuo, Aoyama Kayo, Yamamoto Atsushi, Sakuraba Yuya
Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan.
Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.
iScience. 2021 Jan 5;24(1):101967. doi: 10.1016/j.isci.2020.101967. eCollection 2021 Jan 22.
The Nernst effect generates a voltage transverse to the temperature gradient in the magnetic field. Although the Nernst effect has the potential to realize novel devices in the field of thermoelectric generators and sensors, thermoelectric modules that operate with the Nernst effect have not yet been implemented. Therefore, in this study, a thermoelectric module utilizing the Nernst effect was developed as a prototype, and its performance was evaluated to identify technical issues. The proposed module is fabricated by arranging four rectangular bars of a BiSb-based sintered alloy on an AlN substrate and connecting all the bars in series with Cu plates. As a result of the measurement, when the magnetic field was 5 T, an output power of 0.48 mW was obtained with a temperature difference of 149 K, and a temperature difference of 82 mK occurred as a cooling operation with an applied electrical current of 100 mA.
能斯特效应会在磁场中产生一个垂直于温度梯度的电压。尽管能斯特效应有潜力在热电发电机和传感器领域实现新型器件，但基于能斯特效应运行的热电模块尚未得到应用。因此，在本研究中，开发了一种利用能斯特效应的热电模块作为原型，并对其性能进行评估以识别技术问题。所提出的模块是通过在AlN衬底上排列四个BiSb基烧结合金的矩形棒，并使用铜板将所有棒串联连接而制成的。测量结果表明，当磁场为5 T时，在149 K的温差下获得了0.48 mW的输出功率，并且在施加100 mA电流的冷却运行中产生了82 mK的温差。
