Abstract
It was found the empirical dependence of T c of high-temperature superconducting cuprates (HTSC) from the ratio (J) of such parameters as the distances between Cu atoms in CuO2 plane and the distances from CuO2 plane to adjacent ones of A cations (A − Ca, Sr, Ba, Y, La, and so on), also from the size and charge of A cations and doping atoms with effect on T c is proved experimentally. All HTSC phases are divided only on two groups with an intrinsic dependence T c (J): the phases formed by single CuO2 plane and by several CuO2 planes. The closer approximation of that dependence gives the equation of polynomial of third degree.
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