Effect of elastic stress on the resistivity and T c of (Bi, Pb) 2Sr 2Ca n−1Cu nO x for n = 2 or 3

Abstract

We have measured the effect of elastic uniaxial stress σ in the a direction on the superconducting transition temperature T c of (Bi, Pb) 2Sr 2Ca n−1Cu nO x ( n = 2 or 3, 2212 and 2223). We find dT/d σ 11 = - 10 ± 2 K/GPa for 2212 and - 6 ± 2 for the 2223 compound. Our estimate of the change in T c with a fractional change in the c axis spacing leads to two possible results, 7.3 K/% and -0.6 K/%.