Narayanan, Narendirakumar; Senyshyn, A; Mikhailova, D; Faske, T; Lu, Teng; Liu, Zhen; Weise, B; Ehrenberg, H; Mole, R A; Hutchison, Wayne; Fuess, H; McIntyre, G J; Liu, Yun; Yu, D
We elucidate the magnetic interactions and the role of spin (electron) correlation in determining the ground state of the honeycomb compound Mn4Ta2O9, by neutron powder diffraction, inelastic neutron scattering (INS), specific-heat (Cp) measurements, and electronic-structure calculations. The antiferromagnetic long-range order with moments along c occurs at 102 K with strong exchange striction and small anisotropy. It is described by the three-dimensional Ising model. Diffuse magnetic...[Show more]
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