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 journalArticle

3 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 languageEnglish
Article number064505
JournalPhysical Review B
Volume95
Issue number6
DOIs
Publication statusPublished - 2017 Feb 8

ASJC Scopus subject areas

  • Condensed Matter Physics

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