Experimental investigation of high temperature superconducting imaging surface magnetometry

Autor:	Petr Volegov, Keeran Maharajh, Robert H. Kraus, Andrei N. Matlashov, Michelle A. Espy
Rok vydání:	2002
Předmět:	Superconductivity Physics Squid High-temperature superconductivity Condensed matter physics biology Magnetometer Current source Gradiometer law.invention law Meissner effect Scanning SQUID microscopy biology.animal Instrumentation
Zdroj:	Review of Scientific Instruments. 73:2360-2363
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.1480457
Popis:	The behavior of high temperature superconducting quantum interference devices (SQUIDs) in the presence of high temperature superconducting surfaces has been investigated. When current sources are placed close to a superconducting imaging surface (SIS) an image current is produced due to the Meissner effect. When a SQUID magnetometer is placed near such a surface it will perform in a gradiometric fashion provided the SQUID and source distances to the SIS are much less than the size of the SIS. We present the first experimental verification of this effect for a high temperature SIS and SQUID. Results are presented for two SQUID-SIS configurations, using a 100-mm-diam YBa2Cu3O(7−δ) disk as the SIS. These results indicate that when the current source and sensor coil (SQUID) are close to the SIS, the behavior is that of a first-order gradiometer. The results are compared to analytic solutions as well as the theoretical predictions of a finite element model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5e841165df5a7c9e3529538cbbfdcef6 https://doi.org/10.1063/1.1480457 Zobrazit plný text záznamu