Low-energy magnon excitations and emerging anisotropic nature of short-range order in CrI3
We report on the low-energy magnetic excitations and the evolution of local magnetic fields in CrI3 in a broad frequency regime of 30-330 GHz and in magnetic fields up to 15 T. Modeling the magnon branches by means of a domain-based ferromagnetic resonance model provides the microscopic parameters d...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
9 December 2022
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| In: |
Physical review
Year: 2022, Volume: 106, Issue: 21, Pages: 1-8 |
| ISSN: | 2469-9969 |
| DOI: | 10.1103/PhysRevB.106.214412 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevB.106.214412 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevB.106.214412 
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| Author Notes: | M. Jonak, E. Walendy, J. Arneth, M. Abdel-Hafiez, and R. Klingeler |
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| 245 | 1 | 0 | |a Low-energy magnon excitations and emerging anisotropic nature of short-range order in CrI3 |c M. Jonak, E. Walendy, J. Arneth, M. Abdel-Hafiez, and R. Klingeler |
| 246 | 3 | 3 | |a Low-energy magnon excitations and emerging anisotropic nature of short-range order in CrI 3 |
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| 520 | |a We report on the low-energy magnetic excitations and the evolution of local magnetic fields in CrI3 in a broad frequency regime of 30-330 GHz and in magnetic fields up to 15 T. Modeling the magnon branches by means of a domain-based ferromagnetic resonance model provides the microscopic parameters describing the magnetic excitations in the two-dimensional ferromagnet. Our data reveal the anisotropy gap of Δ=80 GHz at 2 K, which remarkably remains finite at TC and vanishes only above TΔ≃80 K, i.e., for T≳1.3TC. Concomitantly, anisotropic local magnetic fields are probed by a shift of the resonance lines in the same temperature regime. Well above TC, we detect short-range magnetic correlations up to 200 K. The observed changing nature of the short-range correlations at TΔ confirms the importance of spin-orbit coupling for the evolution of long-range ferromagnetism which develops from magnetically anisotropic short-range order. In addition, our analysis of the macroscopic magnetization enables to estimate the number of correlated spins well above TC as well as the in-plane magnetic correlation length ξab. | ||
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| 700 | 1 | |a Arneth, Jan Victor |d 1998- |e VerfasserIn |0 (DE-588)1254551476 |0 (DE-627)1797026208 |4 aut | |
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