Observation of Paramagnetic Meissner Effect in Niobium Disks
- 17 July 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 75 (3), 529-532
- https://doi.org/10.1103/physrevlett.75.529
Abstract
For several superconducting niobium disks, the dc field-cooled magnetization (FCM) shows a paramagnetic response below their superconducting transition temperature when the applied magnetic filed is normal to the disk. At 8.6 K, the FCM reaches a maximum in fields of 5 to 10 Oe and becomes diamagnetic for fields larger than 20 Oe. This FCM behavior is qualitatively similar to the paramagnetic Meissner effect (PME) recently observed in high- cuprate superconductors. Various surface treatments to the Nb disks result in changes in both the zero-field-cooled magnetization and the FCM, including the disappearance of the PME.
Keywords
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