Abstract
Inelastic neutron scattering (INS) experiments have been performed on a V 3 triangular spin cluster. At the base temperature ( T = 0.7 K), the INS spectrum clearly exhibits a broad peak at \(\hbar\omega = 0.8\) meV. The peak was ascribed to the superposition of four magnetic excitations from two S total = 1/2 doublets to two S total = 3/2 doublets. From the observed peak position, width, and intensity, we confirmed a model Hamiltonian comprising anisotropic exchange and Dzyaloshinsky–Moriya (DM) interactions, and estimated the Hamiltonian parameters as J x = J y = -5.73 K, J z = -6.83 K, D 1,2 z = 0.261 K, and D 2,3 z = D 3,1 z = 0.287 K, where J α is the α-component of the exchange interactions and D i , j z represents the z -component of the DM vector between the i -th and j -th V 4+ ions. The resulting model Hamiltonian successfully reproduced the half-step magnetization process reported earlier as well as magnetic susceptibility.
Published Version
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