Tunnel spectra for Al/Al-oxide/Ni80Fe20 junctions under the superconducting transition temperature of Al films

M. Oogane; T. Daibou; H. Kubota; Y. Ando; T. Miyazaki

doi:10.1016/j.jmmm.2003.12.318

Tunnel spectra for Al/Al-oxide/Ni₈₀Fe₂₀ junctions under the superconducting transition temperature of Al films

M. Oogane, T. Daibou, H. Kubota, Y. Ando, T. Miyazaki

ENG - Applied Physics

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

Abstract

Superconductor/insulator/metal (S/I/M) tunnel junction can be used as an indicator of junction quality. For S/I/M junction, zero-bias conductance (ZBC) should be close to zero. However, leakage conductance increases the ZBC values. We measured the ZBC values of the Al/Al-oxide/Ni₈₀Fe₂₀ junctions prepared with various oxidation processes. For strong plasma oxidation (high applied power), most of the junctions showed low ZBC. However, ZBC increased with decreasing power of oxidation. It is considered that oxidation proceeds homogeneously for strong oxidation, compared with weak oxidation process.

Original language	English
Pages (from-to)	e1515-e1516
Journal	Journal of Magnetism and Magnetic Materials
Volume	272-276
Issue number	SUPPL. 1
DOIs	https://doi.org/10.1016/j.jmmm.2003.12.318
Publication status	Published - 2004 May

Keywords

Oxidation process
Tunnel junction
Zero-bias conductance

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2003.12.318

Cite this

@article{7e147810786440818e7843c1b4d975e6,

title = "Tunnel spectra for Al/Al-oxide/Ni80Fe20 junctions under the superconducting transition temperature of Al films",

abstract = "Superconductor/insulator/metal (S/I/M) tunnel junction can be used as an indicator of junction quality. For S/I/M junction, zero-bias conductance (ZBC) should be close to zero. However, leakage conductance increases the ZBC values. We measured the ZBC values of the Al/Al-oxide/Ni80Fe20 junctions prepared with various oxidation processes. For strong plasma oxidation (high applied power), most of the junctions showed low ZBC. However, ZBC increased with decreasing power of oxidation. It is considered that oxidation proceeds homogeneously for strong oxidation, compared with weak oxidation process.",

keywords = "Oxidation process, Tunnel junction, Zero-bias conductance",

author = "M. Oogane and T. Daibou and H. Kubota and Y. Ando and T. Miyazaki",

note = "Funding Information: This study was supported by the IT-program of Research Revolution 2002 (RR2002) “Development of Universal Low-Power Spin Memory”, Grants-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan, CREST of JST (Japan Science and Technology), and the Mitsubishi Foundation.",

year = "2004",

month = may,

doi = "10.1016/j.jmmm.2003.12.318",

language = "English",

volume = "272-276",

pages = "e1515--e1516",

journal = "Journal of Magnetism and Magnetic Materials",

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publisher = "Elsevier",

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T1 - Tunnel spectra for Al/Al-oxide/Ni80Fe20 junctions under the superconducting transition temperature of Al films

AU - Oogane, M.

AU - Daibou, T.

AU - Kubota, H.

AU - Ando, Y.

AU - Miyazaki, T.

N1 - Funding Information: This study was supported by the IT-program of Research Revolution 2002 (RR2002) “Development of Universal Low-Power Spin Memory”, Grants-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan, CREST of JST (Japan Science and Technology), and the Mitsubishi Foundation.

PY - 2004/5

Y1 - 2004/5

N2 - Superconductor/insulator/metal (S/I/M) tunnel junction can be used as an indicator of junction quality. For S/I/M junction, zero-bias conductance (ZBC) should be close to zero. However, leakage conductance increases the ZBC values. We measured the ZBC values of the Al/Al-oxide/Ni80Fe20 junctions prepared with various oxidation processes. For strong plasma oxidation (high applied power), most of the junctions showed low ZBC. However, ZBC increased with decreasing power of oxidation. It is considered that oxidation proceeds homogeneously for strong oxidation, compared with weak oxidation process.

AB - Superconductor/insulator/metal (S/I/M) tunnel junction can be used as an indicator of junction quality. For S/I/M junction, zero-bias conductance (ZBC) should be close to zero. However, leakage conductance increases the ZBC values. We measured the ZBC values of the Al/Al-oxide/Ni80Fe20 junctions prepared with various oxidation processes. For strong plasma oxidation (high applied power), most of the junctions showed low ZBC. However, ZBC increased with decreasing power of oxidation. It is considered that oxidation proceeds homogeneously for strong oxidation, compared with weak oxidation process.

KW - Oxidation process

KW - Tunnel junction

KW - Zero-bias conductance

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

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