Kubíčková, Lenka ; Weber, Anna K. ; Panthöfer, Martin ; Calder, Stuart ; Möller, Angela (2024)
Cs₂Fe₂(MoO₄)₃─A Strongly Frustrated Magnet with Orbital Degrees of Freedom and Magnetocaloric Properties.
In: Chemistry of Materials, 36 (14)
doi: 10.1021/acs.chemmater.4c01262
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We report an in-depth study of the thermodynamic and magnetocaloric properties of a strongly frustrated magnet, Cs₂Fe₂(MoO₄)₃. The underlying structure belongs to the double trillium lattice, which consists of two FeII (S = 2) sites with easy-axis and easy-plane single-ion anisotropy. Detailed ⁵⁷Fe Mössbauer spectroscopic investigations along with ligand-field calculations support the existence of disparate ground states. The antiferromagnetic ordered structure is presented by the propagation vector k = (0,0,0) with noncollinear magnetic moments of 2.97 μB (Fe1) and 0.17 μB (Fe2), respectively. Strong and disordered magnetic correlations exist in the temperature regime between TN ≈ 1.0 K and |θCW| ≈ 22 K. The large degeneracy of the ground state is investigated in terms of its magnetocaloric response. Magnetization and specific heat measurements indicate a significant magnetocaloric cooling efficiency, making this rare-earth-free compound a promising candidate for cryogenic magnetic refrigeration applications, with refrigeration capacity of 79 J kg⁻¹ for Δ(μ₀H) = 8 T.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Kubíčková, Lenka ; Weber, Anna K. ; Panthöfer, Martin ; Calder, Stuart ; Möller, Angela |
| Art des Eintrags: | Bibliographie |
| Titel: | Cs₂Fe₂(MoO₄)₃─A Strongly Frustrated Magnet with Orbital Degrees of Freedom and Magnetocaloric Properties |
| Sprache: | Englisch |
| Publikationsjahr: | 23 Juli 2024 |
| Ort: | Washington, DC |
| Verlag: | American Chemical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Chemistry of Materials |
| Jahrgang/Volume einer Zeitschrift: | 36 |
| (Heft-)Nummer: | 14 |
| DOI: | 10.1021/acs.chemmater.4c01262 |
| Kurzbeschreibung (Abstract): | We report an in-depth study of the thermodynamic and magnetocaloric properties of a strongly frustrated magnet, Cs₂Fe₂(MoO₄)₃. The underlying structure belongs to the double trillium lattice, which consists of two FeII (S = 2) sites with easy-axis and easy-plane single-ion anisotropy. Detailed ⁵⁷Fe Mössbauer spectroscopic investigations along with ligand-field calculations support the existence of disparate ground states. The antiferromagnetic ordered structure is presented by the propagation vector k = (0,0,0) with noncollinear magnetic moments of 2.97 μB (Fe1) and 0.17 μB (Fe2), respectively. Strong and disordered magnetic correlations exist in the temperature regime between TN ≈ 1.0 K and |θCW| ≈ 22 K. The large degeneracy of the ground state is investigated in terms of its magnetocaloric response. Magnetization and specific heat measurements indicate a significant magnetocaloric cooling efficiency, making this rare-earth-free compound a promising candidate for cryogenic magnetic refrigeration applications, with refrigeration capacity of 79 J kg⁻¹ for Δ(μ₀H) = 8 T. |
| Zusätzliche Informationen: | Published as part of Chemistry of Materials virtual special issue “In Memory of Prof. Francis DiSalvo”. |
| 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 07:03 |
| Letzte Änderung: | 26 Sep 2024 07:03 |
| PPN: | 521729823 |
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