Enlargement of Kinetic Inductance of NbN Superconducting Thin Films for Device Applications

Mohammad Sajjad Hossain, Keiji Yoshida, Keisuke Kudo, Keiji Enpuku, Kaoru Yamafuji

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Experimental studies to enlarge kinetic inductance of NbN thin films using the effects of quality and thickness of the film are made by measuring Fiske current steps in the current-voltage (I-V) characteristics of NbN/Pb-In Josephson junctions. Experiments demonstrate that the specific kinetic inductance LK can be enlarged over a wide range by changing stoichiometry of the film, as well as by making the film thickness thin, and that this enlargement becomes larger by both effects when the film thickness is in an ultra thin regime. This inductance is shown to be well fitted to LK0λ2/d, where µ_0 isthevacuumpermeability, d isthethickness, and λ isthemagneticpenetrationdepthinthedirtylimit. Inthepresentexperimentweattainedtheinductanceashighas L_K=130 pHbythecombinedeffectsofimpurityandthicknessforafilmwith d=30 nm.

Original languageEnglish
Pages (from-to)1033-1038
Number of pages6
JournalJapanese Journal of Applied Physics
Volume31
Issue number4 R
DOIs
Publication statusPublished - Jan 1 1992

Fingerprint

Superconducting films
inductance
Inductance
Kinetics
Film thickness
kinetics
film thickness
thin films
Current voltage characteristics
Stoichiometry
Josephson junctions
stoichiometry
Thin films
electric potential
Experiments

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Enlargement of Kinetic Inductance of NbN Superconducting Thin Films for Device Applications. / Hossain, Mohammad Sajjad; Yoshida, Keiji; Kudo, Keisuke; Enpuku, Keiji; Yamafuji, Kaoru.

In: Japanese Journal of Applied Physics, Vol. 31, No. 4 R, 01.01.1992, p. 1033-1038.

Research output: Contribution to journalArticle

Hossain, Mohammad Sajjad ; Yoshida, Keiji ; Kudo, Keisuke ; Enpuku, Keiji ; Yamafuji, Kaoru. / Enlargement of Kinetic Inductance of NbN Superconducting Thin Films for Device Applications. In: Japanese Journal of Applied Physics. 1992 ; Vol. 31, No. 4 R. pp. 1033-1038.
@article{2d72892f662f47ba8704b2326b6b738b,
title = "Enlargement of Kinetic Inductance of NbN Superconducting Thin Films for Device Applications",
abstract = "Experimental studies to enlarge kinetic inductance of NbN thin films using the effects of quality and thickness of the film are made by measuring Fiske current steps in the current-voltage (I-V) characteristics of NbN/Pb-In Josephson junctions. Experiments demonstrate that the specific kinetic inductance LK can be enlarged over a wide range by changing stoichiometry of the film, as well as by making the film thickness thin, and that this enlargement becomes larger by both effects when the film thickness is in an ultra thin regime. This inductance is shown to be well fitted to LK=µ0λ2/d, where µ_0 isthevacuumpermeability, d isthethickness, and λ isthemagneticpenetrationdepthinthedirtylimit. Inthepresentexperimentweattainedtheinductanceashighas L_K=130 pHbythecombinedeffectsofimpurityandthicknessforafilmwith d=30 nm.",
author = "Hossain, {Mohammad Sajjad} and Keiji Yoshida and Keisuke Kudo and Keiji Enpuku and Kaoru Yamafuji",
year = "1992",
month = "1",
day = "1",
doi = "10.1143/JJAP.31.1033",
language = "English",
volume = "31",
pages = "1033--1038",
journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes",
issn = "0021-4922",
publisher = "Institute of Physics",
number = "4 R",

}

TY - JOUR

T1 - Enlargement of Kinetic Inductance of NbN Superconducting Thin Films for Device Applications

AU - Hossain, Mohammad Sajjad

AU - Yoshida, Keiji

AU - Kudo, Keisuke

AU - Enpuku, Keiji

AU - Yamafuji, Kaoru

PY - 1992/1/1

Y1 - 1992/1/1

N2 - Experimental studies to enlarge kinetic inductance of NbN thin films using the effects of quality and thickness of the film are made by measuring Fiske current steps in the current-voltage (I-V) characteristics of NbN/Pb-In Josephson junctions. Experiments demonstrate that the specific kinetic inductance LK can be enlarged over a wide range by changing stoichiometry of the film, as well as by making the film thickness thin, and that this enlargement becomes larger by both effects when the film thickness is in an ultra thin regime. This inductance is shown to be well fitted to LK=µ0λ2/d, where µ_0 isthevacuumpermeability, d isthethickness, and λ isthemagneticpenetrationdepthinthedirtylimit. Inthepresentexperimentweattainedtheinductanceashighas L_K=130 pHbythecombinedeffectsofimpurityandthicknessforafilmwith d=30 nm.

AB - Experimental studies to enlarge kinetic inductance of NbN thin films using the effects of quality and thickness of the film are made by measuring Fiske current steps in the current-voltage (I-V) characteristics of NbN/Pb-In Josephson junctions. Experiments demonstrate that the specific kinetic inductance LK can be enlarged over a wide range by changing stoichiometry of the film, as well as by making the film thickness thin, and that this enlargement becomes larger by both effects when the film thickness is in an ultra thin regime. This inductance is shown to be well fitted to LK=µ0λ2/d, where µ_0 isthevacuumpermeability, d isthethickness, and λ isthemagneticpenetrationdepthinthedirtylimit. Inthepresentexperimentweattainedtheinductanceashighas L_K=130 pHbythecombinedeffectsofimpurityandthicknessforafilmwith d=30 nm.

UR - http://www.scopus.com/inward/record.url?scp=0026852902&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026852902&partnerID=8YFLogxK

U2 - 10.1143/JJAP.31.1033

DO - 10.1143/JJAP.31.1033

M3 - Article

AN - SCOPUS:0026852902

VL - 31

SP - 1033

EP - 1038

JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

SN - 0021-4922

IS - 4 R

ER -