Abstract
The specific heat of high-T c oxide system, Bi-Sr-Ca-Cu-O was measured in a temperature range between 1.7K and 20K. The used specimen has a nominal formula of Bi 4(Sr 0.6Ca 0.4) 6Cu 4O y and exhibits superconductivity below 70K with rather large Meissner volume fraction. In contrast to the results reported for other high-T c systems, there is no appreciable T-linear term in the specific heat of the present system, which seems to negate the argument that a pseudo Fermi surface exists even in the superconducting phase of the high-T c oxides.
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