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Neutron Studies of Tb2Mo2O7

Published

Author(s)

Jason S. Gardner, G. Ehlers, S. O. Diallo

Abstract

We have used the new high energy resolution spectrometer (BaSis), at the Spallation Neutron Source in Oak Ridge, to conclusively prove the existence of a low energy mode at 0.34(1) meV in the spin glass Tb2mo2O7. This mode is reminiscent of the excitation observed in the ordered phases of both Tb2Ti2O7 and Tb2Sn2O7. The dynamical nature of the transition seen in the magnetization at ~25 K suggests that this frustrated magnet shows a dynamic crossover between hight-temperature phase of poorly correlated, quickly relaxing spins to a low-temperature regime with much slower, short ranged spin correlations extending no further than to the next nearest neighbor. Existing theories explain the spin glass transition in terms of a phase transition and order parameters, and assume the existence of a disntict spin glass phase. There is evidence for such a phase in Tb2Mo2Od7^.
Citation
Chinese Journal of Physics
Volume
50
Issue
2

Keywords

spin glass, spin echo

Citation

, J. , Ehlers, G. and , S. (2012), Neutron Studies of Tb<sub>2</sub>Mo<sub>2</sub>O<sub>7</sub>, Chinese Journal of Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=909365 (Accessed February 27, 2024)
Created April 1, 2012, Updated February 19, 2017