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  Magnetic correlations in the triangular antiferromagnet FeGa2S4

Guratinder, K., Schmidt, M., Walker, H., Bewley, R., Wörle, M., Cabra, D., et al. (2021). Magnetic correlations in the triangular antiferromagnet FeGa2S4. Physical Review B, 104(6): 064412, pp. 1-13. doi:10.1103/PhysRevB.104.064412.

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 Creators:
Guratinder, K.1, Author
Schmidt, M.2, Author           
Walker, H.C.1, Author
Bewley, R.1, Author
Wörle, M.1, Author
Cabra, D.1, Author
Osorio, S.A.1, Author
Villalba, M.1, Author
Madsen, A.K.1, Author
Keller, L.1, Author
Wildes, A.1, Author
Puphal, P.1, Author
Cervellino, A.1, Author
Rüegg, C.1, Author
Zaharko, O.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Marcus Schmidt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863415              

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 Abstract: The crystal structure and magnetic correlations in triangular antiferromagnet FeGa2S4 are studied by x-ray diffraction, magnetic susceptibility, neutron diffraction, and neutron inelastic scattering. We report significant mixing at the cation sites and disentangle magnetic properties dominated by major and minor magnetic sites. The magnetic short-range correlations at 0.77Å-1 correspond to the major sites and being static at base temperature they evolve into dynamic correlations around 30-50 K. The minor sites contribute to the magnetic peak at 0.6Å-1, which vanishes at 5.5 K. Our analytical studies of triangular lattice models with bilinear and biquadratic terms provide the ratios between exchanges for the proposed ordering vectors. The modeling of the inelastic neutron spectrum within linear spin-wave theory results in the set of exchange couplings J1=1.7,J2=0.9,J3=0.8meV for the bilinear Heisenberg Hamiltonian. However, not all features of the excitation spectrum are explained with this model. © 2021 American Physical Society.

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Language(s): eng - English
 Dates: 2021-08-062021-08-06
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: DOI: 10.1103/PhysRevB.104.064412
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 104 (6) Sequence Number: 064412 Start / End Page: 1 - 13 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008