Magnetometers based on double relaxation oscillation superconducting quantum interference devices

Derk Jan Adelerhof; Jun Kawai; Keiji Tsukada; Gen Uehara; Hisashi Kado

doi:10.1063/1.113190

Magnetometers based on double relaxation oscillation superconducting quantum interference devices

Derk Jan Adelerhof, Jun Kawai, Keiji Tsukada, Gen Uehara, Hisashi Kado

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Magnetometers based on double relaxation oscillation superconducting quantum interference devices (SQUIDs) (DROSs) have been fabricated and characterized. The DROSs are based on 2×2μm²Nb/AlO_x tunnel junctions and have a 25 turn, tightly coupled input coil. The high flux-to-voltage transfer coefficient of 1-2mV/φ₀ facilitates direct voltage readout by a low-noise dc amplifier. The pickup coil consists of a thin-film Nb gradiometer with a baseline of 40 mm and an inductance of 110 nH. The white field noise of the magnetometer was better than 5 ft/Hz, which is sufficient for magnetoencephalography measurements.

Original language	English
Number of pages	1
Journal	Applied Physics Letters
DOIs	https://doi.org/10.1063/1.113190
Publication status	Published - 1995
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.113190

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title = "Magnetometers based on double relaxation oscillation superconducting quantum interference devices",

abstract = "Magnetometers based on double relaxation oscillation superconducting quantum interference devices (SQUIDs) (DROSs) have been fabricated and characterized. The DROSs are based on 2×2μm2Nb/AlOx tunnel junctions and have a 25 turn, tightly coupled input coil. The high flux-to-voltage transfer coefficient of 1-2mV/φ0 facilitates direct voltage readout by a low-noise dc amplifier. The pickup coil consists of a thin-film Nb gradiometer with a baseline of 40 mm and an inductance of 110 nH. The white field noise of the magnetometer was better than 5 ft/Hz, which is sufficient for magnetoencephalography measurements.",

author = "Adelerhof, {Derk Jan} and Jun Kawai and Keiji Tsukada and Gen Uehara and Hisashi Kado",

year = "1995",

doi = "10.1063/1.113190",

language = "English",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

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T1 - Magnetometers based on double relaxation oscillation superconducting quantum interference devices

AU - Adelerhof, Derk Jan

AU - Kawai, Jun

AU - Tsukada, Keiji

AU - Uehara, Gen

AU - Kado, Hisashi

PY - 1995

Y1 - 1995

N2 - Magnetometers based on double relaxation oscillation superconducting quantum interference devices (SQUIDs) (DROSs) have been fabricated and characterized. The DROSs are based on 2×2μm2Nb/AlOx tunnel junctions and have a 25 turn, tightly coupled input coil. The high flux-to-voltage transfer coefficient of 1-2mV/φ0 facilitates direct voltage readout by a low-noise dc amplifier. The pickup coil consists of a thin-film Nb gradiometer with a baseline of 40 mm and an inductance of 110 nH. The white field noise of the magnetometer was better than 5 ft/Hz, which is sufficient for magnetoencephalography measurements.

AB - Magnetometers based on double relaxation oscillation superconducting quantum interference devices (SQUIDs) (DROSs) have been fabricated and characterized. The DROSs are based on 2×2μm2Nb/AlOx tunnel junctions and have a 25 turn, tightly coupled input coil. The high flux-to-voltage transfer coefficient of 1-2mV/φ0 facilitates direct voltage readout by a low-noise dc amplifier. The pickup coil consists of a thin-film Nb gradiometer with a baseline of 40 mm and an inductance of 110 nH. The white field noise of the magnetometer was better than 5 ft/Hz, which is sufficient for magnetoencephalography measurements.

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DO - 10.1063/1.113190

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SN - 0003-6951

JO - Applied Physics Letters

JF - Applied Physics Letters

ER -

Magnetometers based on double relaxation oscillation superconducting quantum interference devices

Abstract

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