Effect of silver concentration on electric and magnetic properties of HTS composites YBa2Cu3O<i>x</i>–Ag
В. І. ДоценкоB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, KharkovI. F. KislyakB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, KharkovP. P. Pal‐ValB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, KharkovL. N. Pal‐ValB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, KharkovV. D. NatsikB. I. Verkin Physicotechnical Institute of Low Temperatures, Ukrainian Academy of Sciences, Kharkov
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Annotatsiya
The resistive and magnetic properties of the composites YBa2Cu3Ox–Ag are investigated in a wide range of silver concentration (c = 0–100%). It is found that the concentration dependences of the critical temperature Tcz and the critical density Jc are nonmonotonic, the peak values being attained for c = 5–15 vol.% Ag. A quantitative and qualitative correlation between the Jc(c) and the concentration dependence Jcj(c) of the critical current density in the weak coupling subsystem of a granulated superconductor is established. It is shown that the variation of the critical parameters of granulated HTS compounds is associated with the formation of intergranular silver layers of various thickness.
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