Abstract
Abstract From ac susceptibility measurements of the [Bi(Pb)]2Ca2Sr2Cu3Oz (Bi-2223) samples doped with LiCl, we have found and report for the first time anomalously suppressed superconductivity (Tc is anomalously decreasing) in the slightly under-doped region. For our BPSCCO/(LiCl)y samples this region is situated around y=0.07. Hole concentration (p) per number of Cu–O planes of the Bi-2223 unit cell, determined from room temperature thermopower (S 300 K ) measurements, is approximately 0.15 when y is within anomalous region. Literature data shows that for the La-based cuprates, similar suppression of superconductivity was observed at p∼0.12 (so-called “1/8 problem”). This discrepancy would appear because charge ordering phenomenon (probably induced by Li known as a pair breaker as e.g. Zn) may be accompanied by changes in oxygen content or oxygen ordering effects.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
