Kurokawa Yuichiro, Tahara Yusuke, Hamada Yuki, Fujimoto Masahiro, Yuasa Hiromi
Graduate School and Faculty of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
Graduate School of Science and Technology, Shinshu University, Ueda, Nagano, 386-8567, Japan.
Sci Rep. 2022 Oct 5;12(1):16605. doi: 10.1038/s41598-022-21200-9.
We fabricated FeO nanoparticle (NP)-assembled films on flexible polyimide sheets with Pt or Ta cap layer using a spin coating method and DC sputtering. The films were elaborated for spin Seebeck thermoelectric generator applications, and their spin Seebeck voltages were observed. We showed that the thermoelectric power of [Pt film/FeO NP] multilayered films increases with increasing number of stacking n. Additionally, we prepared spin Seebeck thermopile devices in which the FeO NP-assembled films capped by Pt and Ta are connected alternately in series. We demonstrated that spin Seebeck voltages of the thermopile devices are larger than those of single [Pt or Ta film/FeO NP] piece. Our results indicate that the spin Seebeck thermoelectric power of FeO NPs can be enhanced using a simple fabrication process without lithography technique.
我们使用旋涂法和直流溅射在带有铂或钽帽层的柔性聚酰亚胺片材上制备了氧化亚铁纳米颗粒（NP）组装薄膜。这些薄膜是为自旋塞贝克热发电机应用而制备的，并观察到了它们的自旋塞贝克电压。我们表明，[铂薄膜/氧化亚铁NP]多层薄膜的热电功率随着堆叠层数n的增加而增加。此外，我们制备了自旋塞贝克热电堆器件，其中由铂和钽覆盖的氧化亚铁NP组装薄膜交替串联连接。我们证明，热电堆器件的自旋塞贝克电压大于单个[铂或钽薄膜/氧化亚铁NP]片的电压。我们的结果表明，使用无需光刻技术的简单制造工艺可以提高氧化亚铁纳米颗粒的自旋塞贝克热电功率。
