Low-temperature specific heat anomalies in polycrystalline ?-uranium

Hall, R.O.A.; Mortimer, Monika

doi:10.1007/bf00654652

Cited by 9 publications

(1 citation statement)

References 7 publications

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“…Extended x-ray absorption fine structure (EXAFS) is an excellent technique for determining short-range local atomic structure [16] since long-range order is not required for high-quality EXAFS studies. Measurements of the CDW in polycrystalline α-U using XRD, neutron scattering [2,[6][7][8][9][10][11][12][13] and heat capacity (C p ) [17][18] have been made. Measurements of the CDW in polycrystalline α-U using XRD, neutron scattering [2,[6][7][8][9][10][11][12][13] and heat capacity (C p ) [17][18] have been made.…”

Section: Introductionmentioning

confidence: 99%

Local Structure and Vibrational Properties of α-Pu, α-U, and the α-U Charge Density Wave

et al. 2005

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The local atomic environment and vibrational properties of monoclinic α-Pu, orthorhombic α-U, and the α-U charge-density-wave (CDW) modulation are examined by extended x-ray absorption fine structure spectroscopy (EXAFS). Debye-Waller factors from temperaturedependent EXAFS measurements are fit to a correlated Debye model. The observed Pu-Pu bond Debye temperature is θ cD (α-Pu) = 162 ± 5 K for the pure α-Pu phase. The temperature dependence of the U-U nearest neighbor and second nearest neighbor Debye-Waller factors exhibits a sharp discontinuity in slope near T CDW = 43 K, the transition temperature at which the charge-density wave (CDW) in α-U occurs. Our measurement of the CDW using EXAFS is the first observation of the structure of the CDW in polycrystalline α-U.

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