Classical Spin Liquid State in the S=5/2 Heisenberg Kagome Antiferromagnet Li9Fe3 (P2O7)3(PO4)2

被引：20

作者：

Kermarrec, E. ^{[1
]}

Kumar, R. ^{[1
]}

Bernard, G. ^{[1
]}

Henaff, R. ^{[1
]}

Mendels, P. ^{[1
]}

Bert, F. ^{[1
]}

Paulose, P. L. ^{[2
]}

Hazra, B. K. ^{[3
]}

Koteswararao, B. ^{[4
]}

机构：

[1] Univ Paris Saclay, Lab Phys Solides, CNRS, F-91405 Orsay, France

[2] TIFR, Dept Condensed Matter Phys & Mat Sci, Mumbai 400005, Maharashtra, India

[3] Univ Hyderabad, Sch Phys, Hyderabad 500046, India

[4] Indian Inst Technol Tirupati, Dept Phys, Tirupati 517506, Andhra Pradesh, India

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 127卷 / 15期

关键词：

MAGNETIZATION PLATEAUS; SYSTEM; ORDER; DISORDER;

D O I：

10.1103/PhysRevLett.127.157202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the low temperature magnetic properties of a S = 5/2 Heisenberg kagome antiferromagnet, the layered monodiphosphate Li9Fe3(P2O7)(3)(PO4)(2), using magnetization measurements and P-31 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* similar to 5 K. A moderate P-31 NMR line broadening reveals the development of anisotropic short-range correlations concomitantly with a gapless spin-lattice relaxation time T-1 similar to k(B)T/(h) over barS, 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.

引用

页数：6

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