Short-range correlations in the S = 1/2 square-lattice antiferromagnets Sr2CuTeO6 and Sr2CuWO6
We propose a 5 day experiment at D7 to study the spin correlations in the short-range correlated states above TN in the compounds Sr2CuTeO6 and Sr2CuWO6. These are square lattice systems with J1 along the side of the square and J2 along the diagonal. The Te compound has a dominant J1 interaction and orders in a Néel state whereas the W compound has a dominant J2 interaction accompanied by columnar antiferromagnetic order. Thus, long-range order occurs in these compounds below TN = 29K and TN = 24K but above the ordering temperature significant 2D magnetic correlations persist as seen in a broad maximum in the susceptibility and with inelastic neutron scattering. A spin-liquid-like state has previously been observed in the Sr2CuTe(1-x)WxO6 solid solution series. However, a previous D7 experiment on Sr2CuTe(1-x)WxO6 with x = 0.2, 0.5, showed 2D correlations that might correspond to the correlations seen in the parent compounds above the ordering temperature. With the proposed experiment we aim to unravel if the low-temperature states for x = 0.2, 0.5 are simply an extension of the short-range correlated states in the parent compounds or whether they are of a different nature.
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The recommended format for citing this dataset in a research publication is in the following format:
FOGH Ellen; MANGIN-THRO Lucile; MUSTONEN Otto and H. C. Walker. (2020). Short-range correlations in the S = 1/2 square-lattice antiferromagnets Sr2CuTeO6 and Sr2CuWO6. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-32-895
This data is not yet public
This data is not yet public
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