Temperature Dependence of Magnetic Flux Drag Torque for a Single Grain YBa2Cu3O7 Superconductor
نویسندگان
چکیده
A modified close cycle helium gas cryogenic system was used to measure the flux drag torque acting on a free spinning disk magnet by a single grain YBCO superconductor. It was found that at low spinning speed ( less than 8 Hz ) and constant levitation height, the flux drag torque decreased with temperature which behavior is roughly similar to the temperature dependence of the reciprocal of critical current density for a single grain superconductor.
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