Precise determination of magnetic moment of a fluxoid quantum in a superconducting microring

Heonhwa Choi; Yun Won Kim; Soon Gul Lee; Mahn Soo Choi; Min Seok Kim; Jae Hyuk Choi

doi:10.1103/PhysRevB.95.064505

Precise determination of magnetic moment of a fluxoid quantum in a superconducting microring

Heonhwa Choi, Yun Won Kim, Soon Gul Lee, Mahn Soo Choi, Min Seok Kim, Jae Hyuk Choi

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

4 Citations (Scopus)

Abstract

Using dynamic cantilever magnetometry and experimentally determining the cantilever's vibrational mode shape, we precisely measured the magnetic moment of a lithographically defined micron-sized superconducting Nb ring, a key element for the previously proposed subpiconewton force standard. The magnetic moments due to individual magnetic fluxoids and a diamagnetic response were independently determined at T=4.3 K, with a subfemtoampere-square-meter resolution. The results show good agreement with the theoretical estimation yielded by the Brandt and Clem model within the spring constant determination accuracy.

Original language	English
Article number	064505
Journal	Physical Review B
Volume	95
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.95.064505
Publication status	Published - 2017 Feb 8

Bibliographical note

Funding Information:
This work was supported by the Korea Research Institute of Standards and Science under the Establishment of National Physical Measurement Standards and Improvements of Calibration/Measurement Capability project, Grants No. 16011003 and No. 16011012. M.-S.C. was supported by the National Research Foundation of Korea (Grant No. 2015-003689)

Publisher Copyright:
© 2017 American Physical Society.

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.95.064505

Cite this

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title = "Precise determination of magnetic moment of a fluxoid quantum in a superconducting microring",

abstract = "Using dynamic cantilever magnetometry and experimentally determining the cantilever's vibrational mode shape, we precisely measured the magnetic moment of a lithographically defined micron-sized superconducting Nb ring, a key element for the previously proposed subpiconewton force standard. The magnetic moments due to individual magnetic fluxoids and a diamagnetic response were independently determined at T=4.3 K, with a subfemtoampere-square-meter resolution. The results show good agreement with the theoretical estimation yielded by the Brandt and Clem model within the spring constant determination accuracy.",

author = "Heonhwa Choi and Kim, {Yun Won} and Lee, {Soon Gul} and Choi, {Mahn Soo} and Kim, {Min Seok} and Choi, {Jae Hyuk}",

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AU - Kim, Min Seok

AU - Choi, Jae Hyuk

N1 - Funding Information: This work was supported by the Korea Research Institute of Standards and Science under the Establishment of National Physical Measurement Standards and Improvements of Calibration/Measurement Capability project, Grants No. 16011003 and No. 16011012. M.-S.C. was supported by the National Research Foundation of Korea (Grant No. 2015-003689) Publisher Copyright: © 2017 American Physical Society.

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Y1 - 2017/2/8

N2 - Using dynamic cantilever magnetometry and experimentally determining the cantilever's vibrational mode shape, we precisely measured the magnetic moment of a lithographically defined micron-sized superconducting Nb ring, a key element for the previously proposed subpiconewton force standard. The magnetic moments due to individual magnetic fluxoids and a diamagnetic response were independently determined at T=4.3 K, with a subfemtoampere-square-meter resolution. The results show good agreement with the theoretical estimation yielded by the Brandt and Clem model within the spring constant determination accuracy.

AB - Using dynamic cantilever magnetometry and experimentally determining the cantilever's vibrational mode shape, we precisely measured the magnetic moment of a lithographically defined micron-sized superconducting Nb ring, a key element for the previously proposed subpiconewton force standard. The magnetic moments due to individual magnetic fluxoids and a diamagnetic response were independently determined at T=4.3 K, with a subfemtoampere-square-meter resolution. The results show good agreement with the theoretical estimation yielded by the Brandt and Clem model within the spring constant determination accuracy.

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Precise determination of magnetic moment of a fluxoid quantum in a superconducting microring

Abstract

Bibliographical note

ASJC Scopus subject areas

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