Universal linear relations between susceptibility and Tc in cuprates
Abstract
We developed an experimental method for measuring the intrinsic susceptibility of powder of cuprate superconductors in the zero field limit using a DC-magnetometer. The method is tested with lead spheres. Using this method we determine for a number of cuprate families as a function of doping. A universal linear (and not proportionality) relation between Tc and is found. We suggest possible explanations for this phenomenon.
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