Phonon Softening in Au–49.5 at%Cd Alloy
- 1 November 1994
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 33 (11B) , L1631-1633
- https://doi.org/10.1143/jjap.33.l1631
Abstract
Phonon softening was observed in the parent phase of a AuCd alloy which transforms from the β2(B2) parent to ζ2 ′(trigonal) martensite at M s=304 K. Since Cd strongly absorbs neutrons, the isotope 114Cd was used in preparing the single crystal for the measurements. The [ζζ0]TA2( u//[1\bar0]) phonon branch was measured and found to be anomalously low. A minimum is present at ζ=0.35 which softens as M s approaches from above. The results are consistent with the model proposed by Ohba et al. [Materials Trans. JIM 33 (1992) 29] based upon a crystallographic study of the ζ2 ′ phase.Keywords
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