Structural and electrical properties of high and low-density yb-doped Bi(Pb)-2223 superconductor

Ytterbium (yb)-doped of bi(pb)-2223 with varying concentration was prepared by co-precipitation (cop) and solid state reaction (ssr) to produce high density and low density samples respectively. in this work,the samples were characterized by x-ray diffraction analysis (xrd) and resistivity measurement system. substitution of yb in bi(pb)-2223 decreased the volume percentage of 2223 phase,the length of c-parameter,tc and jc towards higher concentration of yb. the crystallographic structure is tetragonal in a low concentration of yb but changes to orthorhombic at higher yb-doped. the high-density samples have a higher volume percentage of 2223 phase and critical temperature,tc for the same concentration of yb compared to low-density samples. however,the critical current density,jc in low-density samples is higher compared to high-density samples due to the large surface area in a porous structure made by sucrose. the large surface area favors improving the grains connectivity during the sintering process. © 2016 penerbit utm press. all rights reserved.