EFFECT OF MAGNETIC FIELD ON THE THERMAL CONDUCTIVITY OF SINGLE CRYSTAL OF YBA2CU3O7-
This research investigated the effect of magnetic field on the thermal conductivity of high temperature type II superconductors. The result suggested that the thermal conductivity of high temperature type II superconductor YBa2Cu3O7- decreases as the applied magnetic field increases at a given temperature. We also found out that the superconducting energy gap of YBa2Cu3O7- decreases in response to increasing temperature and applied magnetic field. At a critical temperature of about 100gK, we noted a sharp decrease in the energy gap of the substance. This implies that, the superconducting energy gap decreases in response to increase in temperature until at a critical temperature of about 100K,the material transits to normal state, thus resulting to increase in superconducting energy gap again. Our finding also revealed that specific heat of YBa2Cu3O7- is proportional to electron density.
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