Maximum magnetic moment in a field-cooled superconducting disk
Masahito Nakagawa, Shigeaki Utsumi, Yasukage Oda
DOI 10.1103/PhysRevB.60.1372 · Physical Review B
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Abstract
We studied the maximum magnetic moments in a field-cooled superconducting disk for fields perpendicular to the disk surface. When the sample was field cooled, a part of the flux remained in the sample. We calculated the (positive) maximum magnetic moments only under the following two conditions. One is that the remaining flux not exceed the flux through the sample above Tc. The other is that the field component perpendicular to the sample surface be zero or positive. As a result, the maximum moment turned out to be about 50% of the full diamagnetic moment. If the observed paramagnetic Meissner effect was caused by flux compression under the two conditions, a positive magnetic moment over 50% of the full diamagnetic moment is impossible for a superconducting disk. For example, we calculated magnetic moments and others for a superconducting disk by assuming that the Bean state is realized around the center of the disk.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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