2024-06-13 カリフォルニア大学リバーサイド校(UCR)
＜関連情報＞
- https://news.ucr.edu/articles/2024/06/13/making-ferromagnets-ready-ultra-fast-communication-and-computation-technology
- https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.132.246701
強磁性体におけるスピン慣性と自己発振 Spin Inertia and Auto-Oscillations in Ferromagnets
Rodolfo Rodriguez, Mikhail Cherkasskii, Rundong Jiang, Ritwik Mondal, Arezoo Etesamirad, Allison Tossounian, Boris A. Ivanov, and Igor Barsukov
Physical Review Letters Published:13 June 2024
DOI:https://doi.org/10.1103/PhysRevLett.132.246701
ABSTRACT
Recent experimental confirmation of spin inertia in ferromagnets positions this well-developed material class as a prime candidate for THz frequency applications. Spin-torque driven critical spin dynamics, such as auto-oscillations, play the central role in many spin-based technologies. Yet, the pressing question on spin inertia’s effect on spin-torque driven dynamics in ferromagnets has remained unexplored. Here, we develop the theoretical framework of precessional auto-oscillations for ferromagnets with spin inertia. We discover and introduce the concept of nutational auto-oscillations and demonstrate that they can become pivotal for future ultrahigh frequency technologies. We conclude by revealing parallels between spin dynamics in ferrimagnets and inertial ferromagnets and derive an isomorphism that establishes a foundation for synergistic knowledge transfer between these research fields.
