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

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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	Undefined
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

Access to Document

10.1021/nl070870f

Cite this

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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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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

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VL - 7

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EP - 5256

JO - Nano letters

JF - Nano letters

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