NanoSQUIDs Based on Niobium Constrictions

A.G.P. Troeman, J.H. Derking, Bert Borger, J. Pleikies, Dick Veldhuis, Johannes W.M. Hilgenkamp

Research output: Contribution to journalArticleAcademicpeer-review

119 Citations (Scopus)

Abstract

Superconducting quantum interference devices (SQUIDs) based on niobium nanobridges have been produced by means of focused ion beam milling. Typical critical currents of 4-25 A and flux sensitivities of 40-200 µV/0 were measured for sensors based on 80 nm wide, 50 nm thick, and 150 nm long bridges. A white flux noise level of 1.5 µ0/Hz1/2 was measured for a device with an area of 900 µm2 and a critical current of 15 µA. The effective area of the smallest produced SQUID was 3.6 × 10-2 µm2. Possible applications for such miniature SQUIDs are in scanning SQUID microscopy and the study of magnetic nanoparticles.
Original languageUndefined
Pages (from-to)2152-5256
Number of pages5
JournalNano letters
Volume7
Issue number7
DOIs
Publication statusPublished - 2007

Keywords

  • IR-59465
  • METIS-241315

Cite this

Troeman, A. G. P., Derking, J. H., Borger, B., Pleikies, J., Veldhuis, D., & Hilgenkamp, J. W. M. (2007). NanoSQUIDs Based on Niobium Constrictions. Nano letters, 7(7), 2152-5256. https://doi.org/10.1021/nl070870f
Troeman, A.G.P. ; Derking, J.H. ; Borger, Bert ; Pleikies, J. ; Veldhuis, Dick ; Hilgenkamp, Johannes W.M. / NanoSQUIDs Based on Niobium Constrictions. In: Nano letters. 2007 ; Vol. 7, No. 7. pp. 2152-5256.
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Troeman, AGP, Derking, JH, Borger, B, Pleikies, J, Veldhuis, D & Hilgenkamp, JWM 2007, 'NanoSQUIDs Based on Niobium Constrictions' Nano letters, vol. 7, no. 7, pp. 2152-5256. https://doi.org/10.1021/nl070870f

NanoSQUIDs Based on Niobium Constrictions. / Troeman, A.G.P.; Derking, J.H.; Borger, Bert; Pleikies, J.; Veldhuis, Dick; Hilgenkamp, Johannes W.M.

In: Nano letters, Vol. 7, No. 7, 2007, p. 2152-5256.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - NanoSQUIDs Based on Niobium Constrictions

AU - Troeman, A.G.P.

AU - Derking, J.H.

AU - Borger, Bert

AU - Pleikies, J.

AU - Veldhuis, Dick

AU - Hilgenkamp, Johannes W.M.

PY - 2007

Y1 - 2007

N2 - Superconducting quantum interference devices (SQUIDs) based on niobium nanobridges have been produced by means of focused ion beam milling. Typical critical currents of 4-25 A and flux sensitivities of 40-200 µV/0 were measured for sensors based on 80 nm wide, 50 nm thick, and 150 nm long bridges. A white flux noise level of 1.5 µ0/Hz1/2 was measured for a device with an area of 900 µm2 and a critical current of 15 µA. The effective area of the smallest produced SQUID was 3.6 × 10-2 µm2. Possible applications for such miniature SQUIDs are in scanning SQUID microscopy and the study of magnetic nanoparticles.

AB - Superconducting quantum interference devices (SQUIDs) based on niobium nanobridges have been produced by means of focused ion beam milling. Typical critical currents of 4-25 A and flux sensitivities of 40-200 µV/0 were measured for sensors based on 80 nm wide, 50 nm thick, and 150 nm long bridges. A white flux noise level of 1.5 µ0/Hz1/2 was measured for a device with an area of 900 µm2 and a critical current of 15 µA. The effective area of the smallest produced SQUID was 3.6 × 10-2 µm2. Possible applications for such miniature SQUIDs are in scanning SQUID microscopy and the study of magnetic nanoparticles.

KW - IR-59465

KW - METIS-241315

U2 - 10.1021/nl070870f

DO - 10.1021/nl070870f

M3 - Article

VL - 7

SP - 2152

EP - 5256

JO - Nano letters

JF - Nano letters

SN - 1530-6984

IS - 7

ER -