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

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研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

7 引文斯高帕斯（Scopus）

摘要

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.

原文	英語
文章編號	064510
期刊	Journal of Applied Physics
卷	100
發行號	6
DOIs	https://doi.org/10.1063/1.2353396
出版狀態	已發佈 - 2006
對外發佈	是

ASJC Scopus subject areas

物理與天文學 (全部)

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10.1063/1.2353396

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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",

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

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