Atomic-scale chemical analyses of niobium oxide/niobium interfaces via atom-probe tomography

Kevin E. Yoon; David N. Seidman; Claire Antoine; Pierre Bauer

doi:10.1063/1.2987483

Atomic-scale chemical analyses of niobium oxide/niobium interfaces via atom-probe tomography

Kevin E. Yoon, David N. Seidman, Claire Antoine, Pierre Bauer

Materials Science and Engineering

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

27 Scopus citations

Abstract

Niobium is the metal of choice for superconducting radio-frequency cavities for the future International Linear Collider. We present the results of atomic-scale characterization of the oxidation of niobium utilizing local-electrode atom-probe tomography employing picosecond laser pulsing. Laser pulsing is utilized to prevent a tip from fracturing as a buried niobium oxide/niobium interface is dissected on an atom-by-atom basis. The thickness of niobium oxide is about 15 nm, the root-mean-square chemical roughness is 0.4 nm, and the composition is close to _Nb2 _O5, which is an insulator, with an interstitial oxygen concentration profile in Nb extending to a depth of 12 nm.

Original language	English (US)
Article number	132502
Journal	Applied Physics Letters
Volume	93
Issue number	13
DOIs	https://doi.org/10.1063/1.2987483
State	Published - 2008

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2987483

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@article{c5bad8dc547e4b01a4b83ae213a0ff80,

title = "Atomic-scale chemical analyses of niobium oxide/niobium interfaces via atom-probe tomography",

abstract = "Niobium is the metal of choice for superconducting radio-frequency cavities for the future International Linear Collider. We present the results of atomic-scale characterization of the oxidation of niobium utilizing local-electrode atom-probe tomography employing picosecond laser pulsing. Laser pulsing is utilized to prevent a tip from fracturing as a buried niobium oxide/niobium interface is dissected on an atom-by-atom basis. The thickness of niobium oxide is about 15 nm, the root-mean-square chemical roughness is 0.4 nm, and the composition is close to Nb2 O5, which is an insulator, with an interstitial oxygen concentration profile in Nb extending to a depth of 12 nm.",

author = "Yoon, {Kevin E.} and Seidman, {David N.} and Claire Antoine and Pierre Bauer",

note = "Funding Information: This research was sponsored by Fermi National Accelerator Laboratory (Dr. Lance Cooley) and the U.S. Department of Energy, High Energy Physics Division. Atom-probe tomography measurements were performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT) and the LEAP tomograph was purchased with funding from the NSF-MRI (Grant No. DMR 0420532) and ONR-DURIP (Grant No. N00014-0400798) programs. Dr. J. Norem (Argonne National Laboratory) is kindly thanked for discussions and much encouragement. Research Assistant Professor Dieter Isheim is thanked for managing NUCAPT. ",

year = "2008",

doi = "10.1063/1.2987483",

language = "English (US)",

volume = "93",

journal = "Applied Physics Letters",

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publisher = "American Institute of Physics",

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AU - Yoon, Kevin E.

AU - Seidman, David N.

AU - Antoine, Claire

AU - Bauer, Pierre

N1 - Funding Information: This research was sponsored by Fermi National Accelerator Laboratory (Dr. Lance Cooley) and the U.S. Department of Energy, High Energy Physics Division. Atom-probe tomography measurements were performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT) and the LEAP tomograph was purchased with funding from the NSF-MRI (Grant No. DMR 0420532) and ONR-DURIP (Grant No. N00014-0400798) programs. Dr. J. Norem (Argonne National Laboratory) is kindly thanked for discussions and much encouragement. Research Assistant Professor Dieter Isheim is thanked for managing NUCAPT.

PY - 2008

Y1 - 2008

N2 - Niobium is the metal of choice for superconducting radio-frequency cavities for the future International Linear Collider. We present the results of atomic-scale characterization of the oxidation of niobium utilizing local-electrode atom-probe tomography employing picosecond laser pulsing. Laser pulsing is utilized to prevent a tip from fracturing as a buried niobium oxide/niobium interface is dissected on an atom-by-atom basis. The thickness of niobium oxide is about 15 nm, the root-mean-square chemical roughness is 0.4 nm, and the composition is close to Nb2 O5, which is an insulator, with an interstitial oxygen concentration profile in Nb extending to a depth of 12 nm.

AB - Niobium is the metal of choice for superconducting radio-frequency cavities for the future International Linear Collider. We present the results of atomic-scale characterization of the oxidation of niobium utilizing local-electrode atom-probe tomography employing picosecond laser pulsing. Laser pulsing is utilized to prevent a tip from fracturing as a buried niobium oxide/niobium interface is dissected on an atom-by-atom basis. The thickness of niobium oxide is about 15 nm, the root-mean-square chemical roughness is 0.4 nm, and the composition is close to Nb2 O5, which is an insulator, with an interstitial oxygen concentration profile in Nb extending to a depth of 12 nm.

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Atomic-scale chemical analyses of niobium oxide/niobium interfaces via atom-probe tomography

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