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• W2767609673 endingPage "508" @default.
• W2767609673 startingPage "503" @default.
• W2767609673 abstract "The magnitude of the parameters of the various proposed model Hamiltonians used to model the macroscopic properties of NiGa2S4 and to interpret experimental observations has been the subject of controversy for more than a decade. Both the nature of the relevant operators (magnetic couplings, biquadratic exchange, and anisotropic terms) and the values of their corresponding interactions are far from settled. Through effective Hamiltonian theory and correlated relativistic ab initio calculations, theoretical chemistry can rigorously extract all the required operators and the magnitudes of their corresponding interactions. In this article, we report the values of all relevant interactions. Contrarily to what is often reported, it is shown that: (1) the biquadratic exchange is negligible and smaller than the three-body terms, (2) the nearest-neighbor interaction is ferromagnetic and dominant, (3) the next-nearest-neighbor coupling is ferromagnetic and small, (4) the next-next-nearest-neighbor coupling is antiferromagnetic and three times smaller than the nearest-neighbor interaction, and (5) the axial parameter for the local magnetic anisotropy is of the same order of magnitude as the nearest-neighbor magnetic coupling." @default.
• W2767609673 created "2017-11-17" @default.
• W2767609673 creator A5018001797 @default.
• W2767609673 creator A5032517876 @default.
• W2767609673 creator A5040341832 @default.
• W2767609673 creator A5079072159 @default.
• W2767609673 date "2017-12-06" @default.
• W2767609673 modified "2023-10-16" @default.
• W2767609673 title "Study of the Electronic Structure of NiGa ₂ S ₄ and Extraction of the Spin Hamiltonian Parameters from Ab Initio Calculations" @default.
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• W2767609673 doi "https://doi.org/10.1002/ejic.201700974" @default.
• W2767609673 hasPublicationYear "2017" @default.
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