Abstract
The authors systematic changes in thermopower, {Tc}, Raman modes and magnetic irreversibility H{sub irr} as a function of carrier hole concentration p in Bi-2223. They have established that Raman spectroscopy can provide an indicator of doping level: the 630cm{sup {minus}1} mode is found to soften with increasing p. A departure of the thermopower from the universal thermopower-doping relationship displayed by other HTS compounds is explained by a non-uniform charge distribution over the three CuO{sub 2} planes. Scaling of H{sub irr} shows the optimal hole concentration for maximum J{sub c} lies beyond currently achieved levels.
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