Quasi-two-dimensional magnetism and antiferromagnetic ground state in Li2FeSiO4
Our experimental (neutron diffraction, Mössbauer spectroscopy, magnetic susceptibility, specific heat) and numerical studies on the evolution of short- and long-range magnetic order in 𝛾II−Li2FeSiO4 suggest a quasi-two-dimensional (2D) nature of magnetism. The experimental data obtained on single...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
17 January 2025
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| In: |
Physical review
Year: 2025, Volume: 111, Issue: 2, Pages: 1-10 |
| ISSN: | 2469-9969 |
| DOI: | 10.1103/PhysRevB.111.024414 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevB.111.024414 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevB.111.024414 
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| Author Notes: | W. Hergett, N. Bouldi, M. Jonak, C. Neef, C. Ritter, M. Abdel-Hafiez, F. Seewald, H.-H. Klauss, M.W. Haverkort, and R. Klingeler |
MARC
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| 245 | 1 | 0 | |a Quasi-two-dimensional magnetism and antiferromagnetic ground state in Li2FeSiO4 |c W. Hergett, N. Bouldi, M. Jonak, C. Neef, C. Ritter, M. Abdel-Hafiez, F. Seewald, H.-H. Klauss, M.W. Haverkort, and R. Klingeler |
| 246 | 3 | 3 | |a Quasi-two-dimensional magnetism and antiferromagnetic ground state in Li 2 FeSiO 4 |
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| 520 | |a Our experimental (neutron diffraction, Mössbauer spectroscopy, magnetic susceptibility, specific heat) and numerical studies on the evolution of short- and long-range magnetic order in II−Li2FeSiO4 suggest a quasi-two-dimensional (2D) nature of magnetism. The experimental data obtained on single crystals imply long-range antiferromagnetic order below N=17 K. A broad maximum in magnetic susceptibility at m≃28 K, observation of magnetic entropy changes up to 100 K, and anisotropy in are indicative of low-dimensional magnetism and suggest short-range magnetic correlations up to 200 K. Neutron diffraction shows that long-range antiferromagnetic order is characterized by the propagation vector =(12,0,12). The ordered moment =2.50(2) B/Fe, at =1.5 K, is along the crystallographic axis. This is consistent with the observed static hyperfine field of hyp=14.8(3)T by Mössbauer spectroscopy which indicates significant orbital contributions. The temperature dependence of hyp yields the critical exponent =0.116(12) which is in the regime of the 2D Ising behavior. LSDA+U studies exploiting the experimental spin structure suggest dominating magnetic exchange coupling within the layers (i.e., 3≃−6 K and 6≃−2 K) while interlayer coupling is much smaller and partly frustrated. This confirms the 2D nature of magnetism and is in full agreement with the experimental findings. | ||
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| 700 | 1 | |a Neef, C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Ritter, C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Abdel-Hafiez, M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Seewald, F. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Klauss, H.-H. |e VerfasserIn |4 aut | |
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