| Autor: |
E, Kermarrec, R, Kumar, G, Bernard, R, Hénaff, P, Mendels, F, Bert, P L, Paulose, B K, Hazra, B, Koteswararao |
| Rok vydání: |
2021 |
| Zdroj: |
Physical review letters. 127(15) |
| ISSN: |
1079-7114 |
| Popis: |
We investigate the low temperature magnetic properties of a S=5/2 Heisenberg kagome antiferromagnet, the layered monodiphosphate Li_{9}Fe_{3}(P_{2}O_{7})_{3}(PO_{4})_{2}, using magnetization measurements and ^{31}P nuclear magnetic resonance. An antiferromagnetic-type order sets in at T_{N}=1.3 K and a characteristic magnetization plateau is observed at 1/3 of the saturation magnetization below T^{*}∼5 K. A moderate ^{31}P NMR line broadening reveals the development of anisotropic short-range correlations concomitantly with a gapless spin-lattice relaxation time T_{1}∼k_{B}T/ℏS, which may point to the presence of a semiclassical nematic spin-liquid state predicted for the Heisenberg kagome antiferromagnetic model or to the persistence of the zero-energy modes of the kagome lattice under large magnetic fields. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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