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|Title: ||YCa3(VO)3(BO3)4: a kagom compound based on vanadium(III) with a highly frustrated ground state.|
|Authors: ||Miiller, W|
|Issue Date: ||8-Mar-2011|
|Publisher: ||American Chemical Society|
|Citation: ||Miiller, W., Christensen, M., Khan, A., Sharma, N., Macquart, R. B., Avdeev, M., et al. (2011). YCa3(VO)3(BO3)4: a kagom compound based on vanadium(III) with a highly frustrated ground state. Chemistry of Materials, 23(5), 1315-1322.|
|Abstract: ||A new S = 1 kagomé compound based on vanadium(III) is reported. The structure was refined simultaneously against single-crystal neutron and X-ray diffraction data, as a gaudefroyite-type with a new supercell (a′ = 2a + b, b′ = −a − 2b, c′ = c) driven by the ordering of columns of isolated triangular BO3(3)− ions. Low-temperature neutron powder diffraction and magnetic (dc and ac susceptibility) data rule out the presence of long-range magnetic order above at least 1.5 K, but specific heat data suggest that the ground state involves short-range magnetic order, which is frustrated by the coexistence/competition of FM and AFM correlations, together with the characteristic geometric frustration of the kagomé lattice. Magnetic susceptibility data rule out a spin-glass state, pointing to an exotic ground state comparable to the spin-ice or spin-liquid states. This makes YCa3(VO)3(BO3)4 one of the most highly frustrated experimental realizations of the kagomé lattice yet discovered. © 2011, American Chemical Society|
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