Abnormal <i>T</i> <i>c</i> change of Bi1.6Pb0.4Sr2Ca2(Cu1−<i>z</i>Ti<i>z</i>)3O<i>x</i> (0.01&amp;lt;<i>z</i>&amp;lt;0.1)

Abstract

Influence of Ti addition (substitution for Cu) on Tc is studied for high Tc Bi1.6Pb0.4Sr2Ca2(Cu1−zTiz)3Ox. An abnormal Tc change is found between z=0.01 and 0.1. Based on results of the electrical resistivity and x-ray diffraction, the abnormal Tc change is discussed.