Sn doped (Cu0.5Tl0.5)Ba2Ca2Cu3−ySnyO10−δ superconductors: Effect on the diamagnetism and phonon modes

Abstract

Mg-doped TlBa2(Ca2-xMgx)(Cu2.2Ti0.8)O10-δ (x = 0, 0.05, 0.15, 0.25, 0.35) superconductors Effect of paramagnetic Mn ion on the superconductivity of Cu0.5Tl0.5Ba2Ca2−xMnxCu3O10−y J. Appl. Phys. 112, 073920 (2012); 10.1063/1.4757405 Effect of Sn substitution on the para-conductivity of polycrystalline Cu 0.5 Tl 0.5 Ba 2 Ca 2 Cu 3 − y Sn y O 10 − δ superconductors

Superconducting Properties of (MnFe2O4)x/CuTl-1223 Composites

“…FTIR absorption spectra of (MnFe 2 O 4 ) x /CuTl-1223 composites in the range from 400 to 700 cm -1 are shown in Figure.5. The absorption modes appearing in the range from 400 to 540 cm -1 are associated with apical oxygen atoms and 541 -600 cm -1 represents the modes of CuO 2 planer oxygen atoms [22] . The modes in the range from 600 to 700 cm -1 are associated with O δ oxygen atoms in the charge reservoir layers.…”