Sm katkılı Bi(Pb)Srcacuo?nın manyetik alınganlık ölçümleri

In this thesis, after investigating the general historical development of hightemperature superconductors, the design of AC susceptometer was made. Afterdesign, we studied on AC characteristic of Bi1.6Pb0.4Sr2Ca2-xSmxCu3Oy with Smsubstitution for (x=0, x=0.0005 x=0.001 x=0.005). We obtained imaginary and realdate by using home-made AC susceptometer. Critical current density Jc versuscritical temperature Tc behaviour studied by using Bean Model and it seem thatcritical temperature of sample Bi1.6Pb0.4Sr2Ca2-xSmxCu3Oy with Sm substitution isdecreasing with increasing of Sm substitution and critical current of sampleBi1.6Pb0.4Sr2Ca2-xSmxCu3Oy is decreasing with increasing of Sm substitution. At thatcritical current decreasing was seen at first substitution. The decreasing at criticalcurrent was not as sharp as first substitution.Keywords: Superconductivity, Resistivity, intergrain critical current density,AC magnetic susceptibility, magnetic flux, Bi(Pb)SrCaCuO