TY - JOUR

T1 - Capacitance distribution of Ni-Nb-Zr-H glassy alloys

AU - Fukuhara, Mikio

AU - Yoshida, Hajime

AU - Fujima, Nobuhisa

AU - Kawarada, Hiroshi

PY - 2012

Y1 - 2012

N2 - Capacitance distribution of {(Ni 0.6Nb 0.4) 1-xZr x} 100-y-H y (x = 0.30, 0.35, 0.40, 0.45 and 0.50, 0 ≥ y ≥ 20) glassy alloy ribbons was carried out by ac impedance analysis at frequency of 1 kHz, in terms of a distributed constant equivalent circuit. The capacitance can be represented by oblique contour lines. The highest capacitance (1-11 μF) could be found near the point when x = 0.40, y = 10, which is a composition occurring room-temperature Coulomb oscillation, while capacitance of the composition (x =0.35, y =4) occurring ballistic transport was around 0.8 μF. The capacitance difference would be explained by an effect of hydrogen localization derived from morphology of distorted Zr-centered icosahedral Zr 5Ni 5Nb 3 clusters and ideal Ni-centered clusters. The electrocapillarity equation showed that the specific capacitance between two electrodes increases parabolic with decreasing the distance, as a polarized glutinous liquid.

AB - Capacitance distribution of {(Ni 0.6Nb 0.4) 1-xZr x} 100-y-H y (x = 0.30, 0.35, 0.40, 0.45 and 0.50, 0 ≥ y ≥ 20) glassy alloy ribbons was carried out by ac impedance analysis at frequency of 1 kHz, in terms of a distributed constant equivalent circuit. The capacitance can be represented by oblique contour lines. The highest capacitance (1-11 μF) could be found near the point when x = 0.40, y = 10, which is a composition occurring room-temperature Coulomb oscillation, while capacitance of the composition (x =0.35, y =4) occurring ballistic transport was around 0.8 μF. The capacitance difference would be explained by an effect of hydrogen localization derived from morphology of distorted Zr-centered icosahedral Zr 5Ni 5Nb 3 clusters and ideal Ni-centered clusters. The electrocapillarity equation showed that the specific capacitance between two electrodes increases parabolic with decreasing the distance, as a polarized glutinous liquid.

KW - Capacitance

KW - Electrocapillarity

KW - Glassy Alloys

KW - Icosahedral Cluster

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U2 - 10.1166/jnn.2012.5862

DO - 10.1166/jnn.2012.5862

M3 - Article

C2 - 22852315

AN - SCOPUS:84863883894

SN - 1533-4880

VL - 12

SP - 3848

EP - 3852

JO - Journal of Nanoscience and Nanotechnology

JF - Journal of Nanoscience and Nanotechnology

IS - 5

ER -