Room Temperature Coulomb Oscillation of a Proton Dot in Ni-Nb-Zr-H Glassy Alloys with Nanofarad Capacitanc

摘要

A dc current-induced voltage oscillation was observed at room temperature in (Ni_(36)Nb_(24)Zr_(40))_(90.1)H_(9.9) glassy alloy ribbons of about 1-mm width and 30-μm thickness and an electrode distance of 20 mm [1]. The l-V characteristic provided evidence of the Coulomb staircase at ~300 K, suggesting the existence of macroscopic proton dot tunneling along the Zr(Nb)-H-□-H-Zr(Nb) atomic bond array, where □ is the vacancy barrier among clusters. The frequency decreased remarkably with increasing capacitance (C) and resistance (R) at room temperature. Thus the (Ni_(36)Nb_(24)Zr_(40)) _(90.1)H_(9.9) glassy alloy can be regarded as a dc/ac converting device with a large number of nF capacitance.