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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Spin Inertia and Auto-Oscillations in Ferromagnets
Rodolfo Rodriguez1, Mikhail Cherkasskii2, Rundong Jiang1
1Department of Physics and Astronomy, <a href="https://ror.org/03nawhv43">University of California</a>, Riverside, California 92521, USA.
Physical Review Letters
|July 1, 2024
Summary
Spin inertia in ferromagnets enables new auto-oscillation dynamics crucial for THz technologies. This study introduces nutational auto-oscillations, paving the way for ultrahigh frequency applications and knowledge transfer in spintronics.
Area of Science:
- Spintronics
- Condensed Matter Physics
- THz Technologies
Background:
- Ferromagnets are key for spintronic devices operating at THz frequencies.
- Spin inertia's impact on spin-torque dynamics in ferromagnets is largely unexplored.
- Auto-oscillations are critical for spin-based technologies.
Purpose of the Study:
- To develop a theoretical framework for precessional auto-oscillations in ferromagnets considering spin inertia.
- To investigate the effect of spin inertia on spin-torque driven dynamics.
- To introduce and analyze nutational auto-oscillations.
Main Methods:
- Theoretical modeling of spin dynamics in ferromagnets.
- Analysis of spin-torque driven auto-oscillations with spin inertia.
- Derivation of an isomorphism between spin dynamics in ferrimagnets and inertial ferromagnets.
Main Results:
- Established a theoretical framework for auto-oscillations in ferromagnets with spin inertia.
- Discovered and introduced the concept of nutational auto-oscillations.
- Demonstrated the potential of nutational auto-oscillations for ultrahigh frequency applications.
Conclusions:
- Spin inertia significantly influences spin-torque driven dynamics in ferromagnets.
- Nutational auto-oscillations offer a new pathway for THz spintronic devices.
- An isomorphism between ferrimagnet and inertial ferromagnet dynamics facilitates cross-field knowledge transfer.
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