Impact of further-range exchange and cubic anisotropy on magnetic excitations in the fcc kagome antiferromagnet

被引：0
|
作者：
LeBlanc, M.D. [1 ]
Aczel, A.A. [2 ]
Granroth, G.E. [2 ]
Southern, B.W. [3 ]
Yan, J.-Q. [4 ]
Nagler, S.E. [2 ]
Whitehead, J.P. [1 ]
Plumer, M.L. [1 ]
机构：
[1] LeBlanc, M.D.
[2] Aczel, A.A.
[3] Granroth, G.E.
[4] Southern, B.W.
[5] Yan, J.-Q.
[6] Nagler, S.E.
[7] Whitehead, J.P.
[8] Plumer, M.L.
来源：
| 1600年 / American Physical Society卷 / 104期
基金：
加拿大创新基金会; 加拿大自然科学与工程研究理事会;
关键词：
Neutron scattering - Antiferromagnetic materials - Magnetic anisotropy - Density functional theory;
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摘要：
This work investigates the effects of further neighbor exchange and cubic anisotropy on the magnetic excitations of the fcc kagome antiferromagnet . Spin wave frequencies are calculated using the torque equation and the dynamical structure factor is determined by a Green's function method as an extension of our previous work. These spin wave calculations are compared with inelastic neutron scattering data of polycrystalline , where magnetic Mn ions occupy lattice sites of ABC-stacked kagome planes. The data are best explained by a spin wave model including exchange interactions up to fourth nearest neighbor and strong cubic anisotropy, as previously predicted by density functional theory calculations. © 2021 American Physical Society
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