Maximum magnetic moment in a field-cooled superconducting disk

We studied the maximum magnetic moments in a held-cooled superconducting di sk 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 (posit ive) maximum magnetic moments only under the following two conditions. One is that the remaining flux not exceed the flux through the sample above T-c . 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 abou t 50% of the Full diamagnetic moment. If the observed paramagnetic Meissner effect was caused by Aux 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 othe rs for a superconducting disk by assuming that the Bean state is realized a round the center of the disk. [S0163-1829(99)11425-5].