Effects of Nickel substitution on crystalline structure and superconducting properties of YBa2Cu3O7-8 ceramics

الملخص EN

Iii this study.

nickel-substituted YBa2{Cux_zNix)-i07_s( 0 < x <4 at.%) superconductor samples nvre prepared by die conventional solid stale reaction method.

The effects of Ni substitution on the structure, microstructure; superconducting properties and Ratwui modes of YBa.2(Cul_xNix')20-j_gsystemshawebeeninvestigatcd.

Ihe Xi-substituted induces aporous, liner grained structure.

'Ihe energy dispersiie X-ray spctroscopy (EDS) analysis continued the incorporation of nickel into the /pains.

amanspectroscopyshoivsthattheXidopingcnhancesthef/isordcratthcCuOzpIanes and decreases the oxygen content by the depletion from the Cu() chains.

Ihe temperature dependent resistivity' measiuementsp(T) show a deviation from linearity, due to the o/x'iiiug of a pseudogap.

IX' susceptibility measurements show that the tiansition temperature decreases uitli increasing Xi content.