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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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Hauptverfasser: Jonák, Martin (VerfasserIn) , Walendy, Erik (VerfasserIn) , Arneth, Jan Victor (VerfasserIn) , Mohamed, Mahmoud (VerfasserIn) , Klingeler, Rüdiger (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 9 December 2022
In: Physical review
Year: 2022, Jahrgang: 106, Heft: 21, Pages: 1-8
ISSN:2469-9969
DOI:10.1103/PhysRevB.106.214412
Online-Zugang: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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Verfasserangaben:M. Jonak, E. Walendy, J. Arneth, M. Abdel-Hafiez, and R. Klingeler
Beschreibung
Zusammenfassung: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.
Beschreibung:Im Titel ist die Zahl "3" tiefgestellt
Gesehen am 30.01.2023
Beschreibung:Online Resource
ISSN:2469-9969
DOI:10.1103/PhysRevB.106.214412

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