Presentation Information
[16a-S4_201-8][The 59th Young Scientist Presentation Award Speech] Significant enhancement of anomalous Nernst effect in Co-based porous thin films
〇Takuya Tsujimoto1, Takeshi Fujita2, Toshio Miyamachi1, Masaki Mizuguchi1 (1.Nagoya Univ., 2.Kochi Univ. Tech.)
Keywords:
anomalous Nernst effect,ferromagnetic material,porous structure
To realize next-generation energy harvesting technologies, the anomalous Nernst effect (ANE) has attracted significant attention. However, the conversion efficiency of the ANE is not sufficient for practical applications, and enhancing the efficiency remains a major challenge.
In this study, we proposed and demonstrated employment of porous nanostructures into magnetic thin films as a strategy to enhance extrinsic contributions. Using a vapor-phase dealloying method, we prepared several porous Co thin films with varying pore sizes.
Our experimental results revealed a significant enhancement of the ANE in porous systems with smaller pore diameters.
To elucidate the mechanism of this enhancement in the ANE, we analyzed the scaling laws between transverse and longitudinal electrical conductivities. The analysis confirmed that the extrinsic mechanism is dominant in these porous structures.
In this study, we proposed and demonstrated employment of porous nanostructures into magnetic thin films as a strategy to enhance extrinsic contributions. Using a vapor-phase dealloying method, we prepared several porous Co thin films with varying pore sizes.
Our experimental results revealed a significant enhancement of the ANE in porous systems with smaller pore diameters.
To elucidate the mechanism of this enhancement in the ANE, we analyzed the scaling laws between transverse and longitudinal electrical conductivities. The analysis confirmed that the extrinsic mechanism is dominant in these porous structures.