Magnetic structure and magnon dynamics of the quasi-two-dimensional antiferromagnet FePS3

被引：168

作者：

Lancon, D. ^{[1
,2
]}

Walker, H. C. ^{[3
]}

Ressouche, E. ^{[4
]}

Ouladdiaf, B. ^{[1
]}

Rule, K. C. ^{[5
]}

McIntyre, G. J. ^{[5
]}

Hicks, T. J. ^{[6
]}

Ronnow, H. M. ^{[2
]}

Wildes, A. R. ^{[1
]}

机构：

[1] Inst Laue Langevin, CS 20156, F-38042 Grenoble 9, France

[2] Ecole Polytech Fed Lausanne, SB ICMP LQM, CH-1015 Lausanne, Switzerland

[3] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[4] CEA Grenoble INAC, Lab MDN, 17 Rue Martyrs, F-38054 Grenoble 9, France

[5] Australian Nucl Sci & Technol Org, Locked Bag 2001, Kirrawee Dc, NSW 2232, Australia

[6] Monash Univ, Sch Phys, Box 27, Clayton, Vic 3800, Australia

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 21期

关键词：

POLARIZATION ANALYSIS; NEUTRON; TRANSITION; CRYSTAL; LAYERS; MNPS3; VISUALIZATION; SPECTROMETER; DIFFRACTION; STACKING;

D O I：

10.1103/PhysRevB.94.214407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Neutron scattering from single crystals has been used to determine the magnetic structure and magnon dynamics of FePS3, an S = 2 Ising-like quasi-two-dimensional antiferromagnet with a honeycomb lattice. The magnetic structure has been confirmed to have a magnetic propagation vector of k(M) = [01 1/2] and the moments are collinear with the normal to the ab planes. The magnon data could be modeled using a Heisenberg Hamiltonian with a single-ion anisotropy. Magnetic interactions up to the third in-plane nearest neighbor needed to be included for a suitable fit. The best fit parameters for the in-plane exchange interactions were J(1) = 1.46, J(2) = -0.04, and J(3) = -0.96 meV. The single-ion anisotropy is large, Delta = 2.66 meV, explaining the Ising-like behavior of the magnetism in the compound. The interlayer exchange is very small, J' = -0.0073 meV, proving that FePS3 is a very good approximation to a two-dimensional magnet.

引用

页数：11

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