Spin Inertia and Auto-Oscillations in Ferromagnets

Spin Inertia and Auto-Oscillations in Ferromagnets

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 pre...

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Veröffentlicht in:Physical review letters 2024-06, Vol.132 (24), p.246701, Article 246701
Hauptverfasser: Rodriguez, Rodolfo, Cherkasskii, Mikhail, Jiang, Rundong, Mondal, Ritwik, Etesamirad, Arezoo, Tossounian, Allison, Ivanov, Boris A, Barsukov, Igor
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container_issue 24
container_start_page 246701
container_title Physical review letters
container_volume 132
creator Rodriguez, Rodolfo
Cherkasskii, Mikhail
Jiang, Rundong
Mondal, Ritwik
Etesamirad, Arezoo
Tossounian, Allison
Ivanov, Boris A
Barsukov, Igor
description 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.
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title Spin Inertia and Auto-Oscillations in Ferromagnets
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