[16a-D61-1~8] 10.2 Fundamental and exploratory device technologies for spin

11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)English Presentation

[16a-D61-8] Investigating the origin of cluster spin glass behavior in low-damped garnet-based ferrimagnet towards neuromorphic computation

〇(PC)shamim sarker¹, Haining Li¹, EMK Ikball Ahamed¹, Hiroyasu Yamahara¹, Siyi Tang¹, Zhiqiang Liao¹, Tetsuya Iizuka¹, Munetoshi Seki¹, Hitoshi Tabata¹ (1.Tokyo Univ)

Keywords:

Spin wave,Spin glass,neuromorphic computing

A spin glass (SG) is characterized by a frozen spin state at low temperatures, resulting from competing randomness and frustration of magnetic interactions. This state also demonstrated photoinduced magnetism and an aging memory effect: that is creates a history-dependent property. This unique feature presents an opportunity to replicate the functions of the human brain, leveraging a similar Hamiltonian framework. Our aim is to study the spin dynamics based ultra-low power data carrier (magnon) in the spin glass system at frozen state to implement a reservoir computing system mimicking the ultra-low power operation as human brain. However, the spin frozen state in spin glasses (SG) only manifests at extremely low temperatures, limiting their practical and low-power applications. Consequently, this research primarily aims to explore the potential for developing optimal room temperature spin glass materials by manipulating the disorder within garnet-based ferromagnetic materials. Considering the dynamics of magnetization for further study, we began with yttrium iron garnet (YIG:Y₃Fe₅O₁₂) due to its exceptionally low Gilbert damping constant.