Precise determination of magnetic moment of a fluxoid quantum in a superconducting microring
| Autor: | Soon Gul Lee, Jae-Hyuk Choi, Yun Won Kim, Heonhwa Choi, Mahn Soo Choi, Min Seok Kim |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Superconductivity Cantilever Condensed matter physics Magnetic moment Physics::Instrumentation and Detectors Magnetometer 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences law.invention Normal mode law Spring (device) Condensed Matter::Superconductivity 0103 physical sciences Diamagnetism 010306 general physics 0210 nano-technology Quantum |
| Zdroj: | Physical Review B. 95 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.95.064505 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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