Spin and charge correlations in the unconventional spin glass Y2Mo2O7
One of the more remarkable aspects of geometrically frustrated magnets is the emergence of spin glass states in the absence of significant amounts of chemical disorder. Conventional solid state theory predicts that frustration and disorder are required for such states, but there have been an increasing number of systems which seem to show only short-ranged ordering at low temperatures with a freezing of magnetic moments. Y2Mo2O7, a pyrochlore lattice with S=1 Mo4+ spins, is perhaps one of the more celebrated examples of these kinds of materials, with an apparent spin-glass transition at T = 22 K. Previous experiments have shown that there is a significant amount of diffuse scattering appearing at high temperatures due to the short-ranged ordering of Mo spins in powder samples. However, until now, there have been no studies on single crystalline samples. Through a collaboration with FSU, UWinnipeg, and NIST, we have grown high quality single crystals of Y2Mo2O7, and have shown through recent NIST experiments on the DCS that significant diffuse scattering is present. With this ILL proposal, we hereby ask for time on D7 to distinguish between charge and spin correlations.
Please note that you will need to login with your ILL credentials to download the data.
Download DataThe recommended format for citing this dataset in a research publication is in the following format:
WIEBE Christopher; GARDNER Jason S.; HALLAS Alannah; SILVERSTEIN Harlyn and WILDES Andrew. (2013). Spin and charge correlations in the unconventional spin glass Y2Mo2O7. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-42-296
ILL has partnered with DataCite as the registration agency
for data persistent identifiers.