Open AccessStudy the partial substitution for Sr at the Ba on the properties of Tl1.6Hg0.4Ba2-ySryCa2Cu3O10δ5 superconductors
Author(s) -
Alyaa Hamid Ali,
Abdul Kareem Dahash Ali,
Kareem A. Jasim
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/871/1/012079
Subject(s) - strontium , barium , tetragonal crystal system , analytical chemistry (journal) , crystallite , materials science , lattice constant , dopant , crystallography , mineralogy , crystal structure , diffraction , chemistry , doping , metallurgy , physics , optoelectronics , organic chemistry , chromatography , optics
In the present study we have reported realization simultaneous effect substitution of strontium at the barium layer of Tl 1.6 Hg 0.4 Ba 2-y Sr y Ca 2 Cu 3 O 10+δ superconductor. Samples of bulk polycrystalline have been prepared by the reaction of solid state process. Four probe technique, is used to find the transition temperature T c . It was found that the critical temperatures at zero resistivity T c(Offset) are T c(Offset) were 95, 115 and 125Kand T c (on) were 45,40 and 45K for Tl 1.6 Hg 0.4 Ba 2-y Sr y Ca 2 Cu 3 O 10+δ with y = 0, 0.1 and 0.2 respectively. The X-ray diffraction study showed that all prepared samples have tetragonal structure, with a clear change in the constants of lattice with strontium-substituted samples compared to this without strontium. It has also been found that a change in the concentrations of strontium leads to a change in, c / a. Tl 1.6 Hg 0.4 Ba 2-y Sr y Ca 2 Cu 3 O 10+δ phase development was observed. The surface morphology studied for prepared specimens using atomic force microscopy (AFM). It was found that the average grain size and surface change with the change of the rate of dopant.