Ac impedance analysis of a Ni-Nb-Zr-H glassy alloy with femtofarad capacitance tunnels

M. Fukuhara; M. Seto; A. Inoue

doi:10.1063/1.3294294

Ac impedance analysis of a Ni-Nb-Zr-H glassy alloy with femtofarad capacitance tunnels

M. Fukuhara, M. Seto, A. Inoue

New Industry Creation Hatchery Center (NICHe)

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

A Nyquist diagram of a (Ni_0.36Nb_0.24Zr _0.40)₉₀H₁₀ glassy alloy shows a semitrue circle, indicating that it is a conducting material with a total capacitance of 17.8 μF. The Bode plots showing the dependencies of its real and imaginary impedances, and phase on frequency suggest a simpler equivalent circuit having a resistor in parallel with a capacitor. Dividing the total capacitance (17.8 μF) by the capacitance of a single tunnel (0.9 fF), we deduced that this material has a high number of dielectric tunnels, which can be regarded as regular prisms separated from the electric-conducting distorted icosahedral Zr₅Ni₅Nb₃ clusters by an average of 0.225 nm.

Original language	English
Article number	043103
Journal	Applied Physics Letters
Volume	96
Issue number	4
DOIs	https://doi.org/10.1063/1.3294294
Publication status	Published - 2010

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3294294

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title = "Ac impedance analysis of a Ni-Nb-Zr-H glassy alloy with femtofarad capacitance tunnels",

abstract = "A Nyquist diagram of a (Ni0.36Nb0.24Zr 0.40)90H10 glassy alloy shows a semitrue circle, indicating that it is a conducting material with a total capacitance of 17.8 μF. The Bode plots showing the dependencies of its real and imaginary impedances, and phase on frequency suggest a simpler equivalent circuit having a resistor in parallel with a capacitor. Dividing the total capacitance (17.8 μF) by the capacitance of a single tunnel (0.9 fF), we deduced that this material has a high number of dielectric tunnels, which can be regarded as regular prisms separated from the electric-conducting distorted icosahedral Zr5Ni5Nb3 clusters by an average of 0.225 nm.",

author = "M. Fukuhara and M. Seto and A. Inoue",

note = "Funding Information: We thank Professor Dr. T. Kamiya (Tokyo Institute of Technology) for his helpful discussions. We gratefully acknowledge support for this work by a Grant-In-Aid for Science Research in the priority area “Research and Development Project on Advanced Metallic Glasses, Inorganic Materials and Joining Technology” from the Japanese Ministry of Education, Science, Sports, and Culture. ",

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doi = "10.1063/1.3294294",

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journal = "Applied Physics Letters",

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T1 - Ac impedance analysis of a Ni-Nb-Zr-H glassy alloy with femtofarad capacitance tunnels

AU - Fukuhara, M.

AU - Seto, M.

AU - Inoue, A.

N1 - Funding Information: We thank Professor Dr. T. Kamiya (Tokyo Institute of Technology) for his helpful discussions. We gratefully acknowledge support for this work by a Grant-In-Aid for Science Research in the priority area “Research and Development Project on Advanced Metallic Glasses, Inorganic Materials and Joining Technology” from the Japanese Ministry of Education, Science, Sports, and Culture.

PY - 2010

Y1 - 2010

N2 - A Nyquist diagram of a (Ni0.36Nb0.24Zr 0.40)90H10 glassy alloy shows a semitrue circle, indicating that it is a conducting material with a total capacitance of 17.8 μF. The Bode plots showing the dependencies of its real and imaginary impedances, and phase on frequency suggest a simpler equivalent circuit having a resistor in parallel with a capacitor. Dividing the total capacitance (17.8 μF) by the capacitance of a single tunnel (0.9 fF), we deduced that this material has a high number of dielectric tunnels, which can be regarded as regular prisms separated from the electric-conducting distorted icosahedral Zr5Ni5Nb3 clusters by an average of 0.225 nm.

AB - A Nyquist diagram of a (Ni0.36Nb0.24Zr 0.40)90H10 glassy alloy shows a semitrue circle, indicating that it is a conducting material with a total capacitance of 17.8 μF. The Bode plots showing the dependencies of its real and imaginary impedances, and phase on frequency suggest a simpler equivalent circuit having a resistor in parallel with a capacitor. Dividing the total capacitance (17.8 μF) by the capacitance of a single tunnel (0.9 fF), we deduced that this material has a high number of dielectric tunnels, which can be regarded as regular prisms separated from the electric-conducting distorted icosahedral Zr5Ni5Nb3 clusters by an average of 0.225 nm.

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Ac impedance analysis of a Ni-Nb-Zr-H glassy alloy with femtofarad capacitance tunnels

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