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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
Christensen, M
Khan, A
Sharma, N
Macquart, RB
Avdeev, M
McIntyre, GJ
Piltz, RO
Lingt, CD
Keywords: Borates
Laue Method
Neutron Diffraction
Crystal Growth
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
ISSN: 0897-4756
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