Superconducting-quantum-interference-device array magnetometers with directly coupled pickup loop and serial flux dams

Chiu Hsien Wu; Hong Chang Yang; Ji Cheng Chen; Kuen Lin Chen; M. J. Chen; J. T. Jeng; Herng Er Horng

doi:10.1063/1.2353396

Superconducting-quantum-interference-device array magnetometers with directly coupled pickup loop and serial flux dams

Chiu Hsien Wu, Hong Chang Yang^*, Ji Cheng Chen, Kuen Lin Chen, M. J. Chen, J. T. Jeng, Herng Er Horng

^*Corresponding author for this work

Undergraduate Program of Electro-Optical Engineering

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

7 Citations (Scopus)

Abstract

In this work, we studied the engineering of high-transition-temperature superconductor Josephson junctions and superconducting quantum interference device (SQUID) by using step-edge or the bicrystal grain-boundary technologies. Serial Josephson junctions and bare SQUID array reveal high quality device characteristics. A high-T_c SQUID magnetometer exhibiting magnetic field sensitivity of 33 fT/Hz^1/2 in the white regime and 80 fT/Hz^1/2 at 1 Hz was demonstrated by incorporating the flux dams and serial SQUID into the pickup loop of magnetometer. Furthermore, we demonstrate the opening of the flux dams by applying an external magnetic field to induce a current higher than the critical current of the serial flux dams. We show that the serial flux dams effectively suppress the low frequency 1/f-like noises.

Original language	English
Article number	064510
Journal	Journal of Applied Physics
Volume	100
Issue number	6
DOIs	https://doi.org/10.1063/1.2353396
Publication status	Published - 2006

ASJC Scopus subject areas

General Physics and Astronomy

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@article{bb179966934844c0907c4d619e25dcb8,

title = "Superconducting-quantum-interference-device array magnetometers with directly coupled pickup loop and serial flux dams",

abstract = "In this work, we studied the engineering of high-transition-temperature superconductor Josephson junctions and superconducting quantum interference device (SQUID) by using step-edge or the bicrystal grain-boundary technologies. Serial Josephson junctions and bare SQUID array reveal high quality device characteristics. A high-Tc SQUID magnetometer exhibiting magnetic field sensitivity of 33 fT/Hz1/2 in the white regime and 80 fT/Hz1/2 at 1 Hz was demonstrated by incorporating the flux dams and serial SQUID into the pickup loop of magnetometer. Furthermore, we demonstrate the opening of the flux dams by applying an external magnetic field to induce a current higher than the critical current of the serial flux dams. We show that the serial flux dams effectively suppress the low frequency 1/f-like noises.",

author = "Wu, {Chiu Hsien} and Yang, {Hong Chang} and Chen, {Ji Cheng} and Chen, {Kuen Lin} and Chen, {M. J.} and Jeng, {J. T.} and Horng, {Herng Er}",

note = "Funding Information: The authors would like to thank the financial supports of the Ministry of Education (91-N-FA01-2-4-2) and the National Science Council of Taiwan (NSC94-2112-M002-015).",

year = "2006",

doi = "10.1063/1.2353396",

language = "English",

volume = "100",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

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TY - JOUR

T1 - Superconducting-quantum-interference-device array magnetometers with directly coupled pickup loop and serial flux dams

AU - Wu, Chiu Hsien

AU - Yang, Hong Chang

AU - Chen, Ji Cheng

AU - Chen, Kuen Lin

AU - Chen, M. J.

AU - Jeng, J. T.

AU - Horng, Herng Er

N1 - Funding Information: The authors would like to thank the financial supports of the Ministry of Education (91-N-FA01-2-4-2) and the National Science Council of Taiwan (NSC94-2112-M002-015).

PY - 2006

Y1 - 2006

N2 - In this work, we studied the engineering of high-transition-temperature superconductor Josephson junctions and superconducting quantum interference device (SQUID) by using step-edge or the bicrystal grain-boundary technologies. Serial Josephson junctions and bare SQUID array reveal high quality device characteristics. A high-Tc SQUID magnetometer exhibiting magnetic field sensitivity of 33 fT/Hz1/2 in the white regime and 80 fT/Hz1/2 at 1 Hz was demonstrated by incorporating the flux dams and serial SQUID into the pickup loop of magnetometer. Furthermore, we demonstrate the opening of the flux dams by applying an external magnetic field to induce a current higher than the critical current of the serial flux dams. We show that the serial flux dams effectively suppress the low frequency 1/f-like noises.

AB - In this work, we studied the engineering of high-transition-temperature superconductor Josephson junctions and superconducting quantum interference device (SQUID) by using step-edge or the bicrystal grain-boundary technologies. Serial Josephson junctions and bare SQUID array reveal high quality device characteristics. A high-Tc SQUID magnetometer exhibiting magnetic field sensitivity of 33 fT/Hz1/2 in the white regime and 80 fT/Hz1/2 at 1 Hz was demonstrated by incorporating the flux dams and serial SQUID into the pickup loop of magnetometer. Furthermore, we demonstrate the opening of the flux dams by applying an external magnetic field to induce a current higher than the critical current of the serial flux dams. We show that the serial flux dams effectively suppress the low frequency 1/f-like noises.

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DO - 10.1063/1.2353396

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SN - 0021-8979

VL - 100

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 6

M1 - 064510

ER -

Superconducting-quantum-interference-device array magnetometers with directly coupled pickup loop and serial flux dams

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