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Ultrasound studies of U2Zn17 and UCu5
Abstract
We present here resonant ultrasound spectroscopy measurements of the elastic moduli and attenuation for U2Zn17 and UCu5 through the respective TN's of 9.7 and 15 K. For single-crystal U2Zn17, the data are the first modulus measurements for this material, and exhibit a very large softening of the sound velocity and an anomalous increase in attenuation below TN, while no precursors at all are observed above. Polycrystalline UCu5, in contrast, exhibits weak softening above TN, and a weak stiffening below. © 1994.
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