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High-frequency electron spin resonance in Kagome-Lattice YMn6Sn6
Lovia Ofori1, Johan van Tol2, Nathan Tolva3
1Department of Physics, The University of Texas at El Paso, El Paso, TX 79968, United States of America.
Journal of Physics. Condensed Matter : an Institute of Physics Journal
|February 20, 2026
Summary
Very high-frequency electron spin resonance (VHF-ESR) revealed distinct magnetic phases in YMn6Sn6 metallic Kagome magnets. The study identified Transverse Conical Spiral, fan-like, and Forced-Ferromagnetic phases, indicating 2D spin correlations for spintronic applications.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- Metallic Kagome magnets exhibit complex magnetic properties and phases.
- YMn6Sn6 (Y166) is a notable material within this class, displaying multiple magnetic phases.
- Understanding local magnetic interactions is crucial for characterizing these materials.
Purpose of the Study:
- To investigate the local microscopic magnetic interactions of Mn ions in Y166.
- To identify magnetic phases and understand their temperature and frequency dependence.
- To explore the implications for high-frequency applications and spintronics.
Main Methods:
- Employed very high-frequency electron spin resonance (VHF-ESR) spectroscopy.
- Studied temperature-dependent ESR behavior (5 K - 350 K) at microwave frequencies (120, 240, 300 GHz).
- Analyzed in-plane (IP) and out-of-plane (OOP) magnetic field orientations and angular dependence.
Main Results:
- Identified Transverse Conical Spiral (TCS), fan-like (FL), and Forced-Ferromagnetic (FF) magnetic phases.
- Observed a (3cos2θ - 1)-like angular dependence of the resonance field at 290 K and 240 GHz, indicating 2D spin correlations.
- The Distorted Spiral (DS) phase was not observed due to measurement field ranges.
Conclusions:
- VHF-ESR is effective in probing microscopic magnetic interactions in Y166.
- The findings reveal key magnetic phases and confirm 2D spin correlations.
- Results have potential applications in high-frequency microwave, terahertz communications, and spintronics.
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