Chiral spin-wave excitations of the spin-5/2 trimers in the langasite compound Ba3NbFe3Si2O14

Abstract

The inelastic scattering of neutrons from magnetic excitations in the antiferromagnetic phase of the langasite compound Ba3NbFe3Si2O14 is analyzed theoretically. In the calculations presented, the strongly coupled spin-5/2 Fe triangles are accounted for as trimerized units. The weaker interactions between the trimers are included within the mean-field/random-phase approximation. The theory is compared with linear spin-wave theory, and a model is developed which leads to good agreement with the published results from unpolarized and polarized neutron-scattering experiments.

10 pages, 9 figures

References in corpus (5)

• Single domain magnetic helicity and triangular chirality in structurally enantiopure Ba3NbFe3Si2O14
• Magnetic and dielectric properties in the langasite-type compounds : A3BFe3D2O14 with A=Ba, Sr, Ca, B=Ta, Nb, Sb and D=Ge, Si
• Helimagnon Bands as Universal Spin Excitations of Chiral Magnets
• Parity Broken Chiral Spin Dynamics in Ba${}_3$NbFe${}_3$Si${}_2$O${}_{14}$
• Helical spin-waves, magnetic order, and fluctuations in the langasite compound Ba3NbFe3Si2O14

Cited by in corpus (11)

• Linear spin wave theory for single-Q incommensurate magnetic structures
• Magnetic chirality as probed by neutron scattering
• Holographic impurities and Kondo effect
• Role of Antisymmetric Exchange in Selecting Magnetic Chirality in Ba${}_3$NbFe${}_3$Si${}_2$O${}_{14}$
• THz Magneto-electric atomic rotations in the chiral compound Ba${}_3$NbFe${}_3$Si${}_2$O${}_{14}$
• Dzyaloshinsky-Moriya driven helical-butterfly structure in Ba3NbFe3Si2O14
• Manifolds of magnetic ordered states and excitations in the almost Heisenberg pyrochlore antiferromagnet MgCr2O4
• Nonreciprocal spin waves in a chiral antiferromagnet without the Dzyaloshinskii-Moriya interaction
• Helical bunching and symmetry lowering inducing multiferroicity in Fe langasites
• Spin-wave dispersion and magnon chirality in multiferroic TbMnO3
• Spin-wave directional anisotropies in antiferromagnetic Ba${}_3$NbFe${}_3$Si${}_2$O${}_{14}$