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Classical Spin Liquid State in the S=5/2 Heisenberg Kagome Antiferromagnet Li_{9}Fe_{3}(P_{2}O_{7})_{3}(PO_{4})_{2}

Kermarrec, E ; Kumar, R ; Bernard, G ; Hénaff, R ; Mendels, P ; Bert, F ; Paulose, P L ; Hazra, B K ; Koteswararao, B

Physical review letters, 2021-10, Vol.127 (15), p.157202-157202 [Periódico revisado por pares]

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Título:
Classical Spin Liquid State in the S=5/2 Heisenberg Kagome Antiferromagnet Li_{9}Fe_{3}(P_{2}O_{7})_{3}(PO_{4})_{2}
Autor: Kermarrec, E ; Kumar, R ; Bernard, G ; Hénaff, R ; Mendels, P ; Bert, F ; Paulose, P L ; Hazra, B K ; Koteswararao, B
Assuntos: Physics
É parte de: Physical review letters, 2021-10, Vol.127 (15), p.157202-157202
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: 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.
Editor: American Physical Society
Idioma: Inglês

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