Magnetic shielding properties of YBa2Cu3O7-x superconductors

Magnetic shielding properties of YBa2Cu3O7-x superconductors

We have developed a highly sensitive ac magnetic method, using a modified two-coil technique, for measuring magnetic shielding effectiveness (S) of high-temperature superconductors in planar form. Incorporated in the measurement was a pair of iron E pieces, which significantly reduce flux leakage ar...

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Veröffentlicht in:Applied physics letters 1990-12, Vol.57 (24), p.2603-2605
Hauptverfasser: CHEN, Q. Y, MCARDLE, J. L, WERNER, T. R, LENZ, J. E
Format: Artikel
Sprache:eng
Schlagworte:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Physics
Properties of type I and type II superconductors
Superconductivity
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Zusammenfassung:We have developed a highly sensitive ac magnetic method, using a modified two-coil technique, for measuring magnetic shielding effectiveness (S) of high-temperature superconductors in planar form. Incorporated in the measurement was a pair of iron E pieces, which significantly reduce flux leakage around the sample edge. Below a threshold field, the S values measured at 77 K for bulk superconducting YBa2Cu3O7−x compounds were typically 110 dB. This method is particularly useful for determining threshold field and observing trapped-flux behaviors in high-temperature superconductors.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.104187