| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
2024 Graduate Student Poster Contest
|
| Presentation Title |
SPG-30: Control of Magnon Thermal Conductivity in Spin-Ladder Cuprate for Advanced Thermal Management by Electrochemical Reaction With Water |
| Author(s) |
Taisei Katayama, Chitose Ishikawa, Nobuaki Terakado, Takayuki Kawamata, Koki Naruse, Yoshihiro Takahashi, Takumi Fujiwara |
| On-Site Speaker (Planned) |
Taisei Katayama |
| Abstract Scope |
We have focused on magnon thermal conductive materials to realize devices enabling dynamic control of heat and temperature. Notably, the mean free path of magnons working as heat carrier decreases with increasing carrier concentration, allowing dynamic control of heat by electric/electrochemical control of its concentration. We found that voltage application through water to spin-ladder cuprate La5Ca9Cu24O41 provides surface hydrogeneration down to a depth of ~100 nm and decrease in averaged thermal conductivity in the hydrogenated area by as great as 90% from ~45 to ~5 W/(m K).We infer that prevention of magnon propagation by hydrogeneration-induced spin defects causes the giant reduction in thermal conductivity. This electrochemical method to control magnon will pave the way to realization of state-of-the-art heat and temperature control devises. |