Superconducting Nb-film LC resonator

Leif Grönberg, Ilkka Suni, A. Finne, R. Blaauwgeers, V. Eltsov, G. Eska, J. Ruohio, R. Schanen, M. Krusius

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Sputtered Nb thin-film LC resonators for low frequencies at 0.5 MHz have been fabricated and tested in the temperature range 0.05–1 K in magnetic fields up to 30 mT. Their Q value increases towards decreasing temperature as Q∝T−0.5 and reaches ∼103 at 0.05 K. As a function of magnetic field Q is unstable and displays variations up to 50%, which are reproducible from one field sweep to the next. These instabilities are attributed to dielectric losses in the plasma deposited SiO2 insulation layer, since the thin-film coil alone reaches a Q≳105 at 0.05 K.
Original languageEnglish
Pages (from-to)3682-3686
Number of pages5
JournalReview of Scientific Instruments
Volume72
Issue number9
DOIs
Publication statusPublished - 2001
MoE publication typeA1 Journal article-refereed

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Superconducting films
superconducting films
Resonators
resonators
Magnetic fields
Thin films
Plasma stability
Dielectric losses
thin films
dielectric loss
magnetic fields
insulation
Insulation
coils
Display devices
low frequencies
Plasmas
Temperature
temperature

Cite this

Grönberg, L., Suni, I., Finne, A., Blaauwgeers, R., Eltsov, V., Eska, G., ... Krusius, M. (2001). Superconducting Nb-film LC resonator. Review of Scientific Instruments, 72(9), 3682-3686. https://doi.org/10.1063/1.1394179
Grönberg, Leif ; Suni, Ilkka ; Finne, A. ; Blaauwgeers, R. ; Eltsov, V. ; Eska, G. ; Ruohio, J. ; Schanen, R. ; Krusius, M. / Superconducting Nb-film LC resonator. In: Review of Scientific Instruments. 2001 ; Vol. 72, No. 9. pp. 3682-3686.
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title = "Superconducting Nb-film LC resonator",
abstract = "Sputtered Nb thin-film LC resonators for low frequencies at 0.5 MHz have been fabricated and tested in the temperature range 0.05–1 K in magnetic fields up to 30 mT. Their Q value increases towards decreasing temperature as Q∝T−0.5 and reaches ∼103 at 0.05 K. As a function of magnetic field Q is unstable and displays variations up to 50{\%}, which are reproducible from one field sweep to the next. These instabilities are attributed to dielectric losses in the plasma deposited SiO2 insulation layer, since the thin-film coil alone reaches a Q≳105 at 0.05 K.",
author = "Leif Gr{\"o}nberg and Ilkka Suni and A. Finne and R. Blaauwgeers and V. Eltsov and G. Eska and J. Ruohio and R. Schanen and M. Krusius",
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Grönberg, L, Suni, I, Finne, A, Blaauwgeers, R, Eltsov, V, Eska, G, Ruohio, J, Schanen, R & Krusius, M 2001, 'Superconducting Nb-film LC resonator', Review of Scientific Instruments, vol. 72, no. 9, pp. 3682-3686. https://doi.org/10.1063/1.1394179

Superconducting Nb-film LC resonator. / Grönberg, Leif; Suni, Ilkka; Finne, A.; Blaauwgeers, R.; Eltsov, V.; Eska, G.; Ruohio, J.; Schanen, R.; Krusius, M.

In: Review of Scientific Instruments, Vol. 72, No. 9, 2001, p. 3682-3686.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Superconducting Nb-film LC resonator

AU - Grönberg, Leif

AU - Suni, Ilkka

AU - Finne, A.

AU - Blaauwgeers, R.

AU - Eltsov, V.

AU - Eska, G.

AU - Ruohio, J.

AU - Schanen, R.

AU - Krusius, M.

N1 - Project code: SQUID 2000

PY - 2001

Y1 - 2001

N2 - Sputtered Nb thin-film LC resonators for low frequencies at 0.5 MHz have been fabricated and tested in the temperature range 0.05–1 K in magnetic fields up to 30 mT. Their Q value increases towards decreasing temperature as Q∝T−0.5 and reaches ∼103 at 0.05 K. As a function of magnetic field Q is unstable and displays variations up to 50%, which are reproducible from one field sweep to the next. These instabilities are attributed to dielectric losses in the plasma deposited SiO2 insulation layer, since the thin-film coil alone reaches a Q≳105 at 0.05 K.

AB - Sputtered Nb thin-film LC resonators for low frequencies at 0.5 MHz have been fabricated and tested in the temperature range 0.05–1 K in magnetic fields up to 30 mT. Their Q value increases towards decreasing temperature as Q∝T−0.5 and reaches ∼103 at 0.05 K. As a function of magnetic field Q is unstable and displays variations up to 50%, which are reproducible from one field sweep to the next. These instabilities are attributed to dielectric losses in the plasma deposited SiO2 insulation layer, since the thin-film coil alone reaches a Q≳105 at 0.05 K.

U2 - 10.1063/1.1394179

DO - 10.1063/1.1394179

M3 - Article

VL - 72

SP - 3682

EP - 3686

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

SN - 0034-6748

IS - 9

ER -

Grönberg L, Suni I, Finne A, Blaauwgeers R, Eltsov V, Eska G et al. Superconducting Nb-film LC resonator. Review of Scientific Instruments. 2001;72(9):3682-3686. https://doi.org/10.1063/1.1394179