Presentation Information
[9a-C310-5]Control of optical, electrical and thermal properties of the thin films by metal-semiconductor phase-change caused by hydro-/dehydrogenation reactions (10): Electron-to-phonon dominated heat transport switching
〇Yuzo Shigesato1 (1.Aoyama Gakuin Univ.)
Keywords:
switchable mirror films,hydro/dehydrogenation,thermal switch
Switchable Mirror Materials (SMMs) exhibit reversible metal-semiconductor phase transitions through hydrogenation and dehydrogenation, enabling wide-range control of electrical, optical, and thermal properties. In this study, we investigate rare-earth SMMs such as Gd, Sm, Sm-Mg, Y-Mg, as well as transition-metal-Mg alloys including Ni-Mg and Ti-Mg. Using both gasochromic (GC) and electrochromic (EC) switching, we performed in-situ structural, electrical, optical, and thermal measurements to evaluate their switching behavior. Comparative analysis reveals distinct hydrogenation mechanisms among these material systems and demonstrates a clear transition from electron-dominated to phonon-dominated heat transport. These results highlight the potential of SMMs as reversible thermal-transport switching materials for advanced thermal management applications.