NanoSQUIDs Based on Niobium Constrictions

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

doi:10.1021/nl070870f

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 journal › Article › Academic › peer-review

146 Citations (Scopus)

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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 language	English
Pages (from-to)	2152-5256
Number of pages	5
Journal	Nano letters
Volume	7
Issue number	7
DOIs	https://doi.org/10.1021/nl070870f
Publication status	Published - 2007

Keywords

IR-59465
METIS-241315

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10.1021/nl070870f

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title = "NanoSQUIDs Based on Niobium Constrictions",

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.",

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author = "A.G.P. Troeman and J.H. Derking and Bert Borger and J. Pleikies and Dick Veldhuis and Hilgenkamp, \{Johannes W.M.\}",

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journal = "Nano letters",

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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

SN - 1530-6984

VL - 7

SP - 2152

EP - 5256

JO - Nano letters

JF - Nano letters

IS - 7

ER -

NanoSQUIDs Based on Niobium Constrictions

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Keywords

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