Panthöfer, Martin ; Berinskat, Stefanie ; Predelli, Fabian ; Lemmens, Peter ; Möller, Angela (2024)
Confinement of magnetic solitons and edge states in a van der Waals material: FeOCl.
In: Physical Review Materials, 8 (4)
doi: 10.1103/PhysRevMaterials.8.044003
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
In a comparative and systematic study on finite-size particles the isostructural van der Waals materials ScOCl, ScOBr, and FeOCl, are investigated. The origin of unconventional magnetic properties of FeOCl (S = 5/2) is elucidated. Experimental evidence for fluctuations are presented and discussed in relation to soliton condensation into topological edge states. The anisotropy within 2 ∞[FeO4/4Cl2/2] corrugated layers gives rise to the formation of solitons (1D) with parameters given here and to the development of 2D-Ising magnetic order around 20 K. The latter is identified by a λ anomaly in the specific heat and a kink in the magnetic susceptibility. Concomitantly, the canting angle of moments along the spin-chain direction changes. We attribute this to a magnetoelastic effect. The finite size of the chains (≈143 Fe-sites ≈ ξs at 20 K) results in the confinement of solitons, which condense into breathers. In small applied magnetic fields the dynamics unfold and a spin-glass-like phase below 5 K is established. Phonon anharmonicities revealed by Raman scattering are explained by diffusional dynamics and are in agreement with the derived soliton energy from Mössbauer spectroscopy.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Panthöfer, Martin ; Berinskat, Stefanie ; Predelli, Fabian ; Lemmens, Peter ; Möller, Angela |
| Art des Eintrags: | Bibliographie |
| Titel: | Confinement of magnetic solitons and edge states in a van der Waals material: FeOCl |
| Sprache: | Englisch |
| Publikationsjahr: | 15 April 2024 |
| Ort: | College Park, MD |
| Verlag: | American Physical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review Materials |
| Jahrgang/Volume einer Zeitschrift: | 8 |
| (Heft-)Nummer: | 4 |
| Kollation: | 11 Seiten |
| DOI: | 10.1103/PhysRevMaterials.8.044003 |
| Kurzbeschreibung (Abstract): | In a comparative and systematic study on finite-size particles the isostructural van der Waals materials ScOCl, ScOBr, and FeOCl, are investigated. The origin of unconventional magnetic properties of FeOCl (S = 5/2) is elucidated. Experimental evidence for fluctuations are presented and discussed in relation to soliton condensation into topological edge states. The anisotropy within 2 ∞[FeO4/4Cl2/2] corrugated layers gives rise to the formation of solitons (1D) with parameters given here and to the development of 2D-Ising magnetic order around 20 K. The latter is identified by a λ anomaly in the specific heat and a kink in the magnetic susceptibility. Concomitantly, the canting angle of moments along the spin-chain direction changes. We attribute this to a magnetoelastic effect. The finite size of the chains (≈143 Fe-sites ≈ ξs at 20 K) results in the confinement of solitons, which condense into breathers. In small applied magnetic fields the dynamics unfold and a spin-glass-like phase below 5 K is established. Phonon anharmonicities revealed by Raman scattering are explained by diffusional dynamics and are in agreement with the derived soliton energy from Mössbauer spectroscopy. |
| ID-Nummer: | Artikel-ID: 044003 |
| Fachbereich(e)/-gebiet(e): | DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1487: Eisen, neu gedacht! |
| Hinterlegungsdatum: | 26 Sep 2024 08:10 |
| Letzte Änderung: | 26 Sep 2024 08:10 |
| PPN: | 521732042 |
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