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Updated: Oct 4, 2025
10:52
Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
Published on: July 27, 2022
2.9K
Hopfion dynamics in chiral magnets
Zulfidin Khodzhaev1, Emrah Turgut1,2
1Department of Physics, Oklahoma State University, Stillwater, OK 74078, United States of America.
Summary
Resonant spin dynamics reveal the topological nature of Neel and Bloch hopfions. These unique spin-wave signatures can identify these complex magnetic structures in chiral magnets.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Spintronics
Background:
- Topological spin textures exhibit unique properties linked to their topology.
- Understanding these properties is crucial for advanced magnetic applications.
Purpose of the Study:
- Investigate resonant spin dynamics of 3D topological spin textures: Neel and Bloch hopfions.
- Correlate spin dynamics with topological characteristics for identification.
- Provide experimental guidance for detecting hopfions in chiral magnets.
Main Methods:
- Utilized micromagnetic simulations to stabilize Neel and Bloch hopfions.
- Investigated the influence of Dzyaloshinskii-Moriya interaction (DMI), anisotropies, confinement, and demagnetizing fields.
- Calculated the Hopf number to confirm topological nature.
- Computed resonance frequencies and spin-wave modes under varying magnetic fields.
Main Results:
- Successfully stabilized Bloch and Neel hopfions using bulk and interfacial DMI.
- Identified ground state spin configurations and the impact of various physical parameters.
- Observed unique resonance frequencies and magnetic field dependencies for each hopfion type.
- Demonstrated a correlation between spin dynamics and topological invariants.
Conclusions:
- Resonant spin dynamics serve as a fingerprint for identifying 3D topological spin textures like hopfions.
- The study provides a pathway for experimental detection of hopfions when direct imaging is challenging.
- Findings contribute to the fundamental understanding and potential applications of topological spintronics.
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