Akio Kawasaki, Satoshi Itoh, Kunihiro Shima, Toshimitsu Yamazaki
We observed an unexpected bending of a horizontally held palladium plate at 150$^{\circ}$C under a small external shearing stress. The deformation was fastest at the nominal composition of PdH$_{{\rm 0.1-0.2}}$, which is in the $\alpha+\beta$ phase. We also observed that a plate warped back and forth during a cycle of absorption and desoprtion of hydrogen when it was hung vertically, which does not have a reasonable explanation.
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http://arxiv.org/abs/1011.2776
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