A new superconductor with 1222 structure (Cu1-xMx)Sr-2(Y1-yCey)(2)Cu2O delta(M = Ti, V, Cr, Fe, Co, Ga, Ge, Mo, Ce, W and Re)

作者：Tamura M^*; Sato M; Den T; Akimitsu J

来源：Physica C-Superconductivity and Its Applications, 1998, 303(1-2): 1-10.

DOI：10.1016/S0921-4534(98)00216-0

• superconductor
• cuprates
• Cu 1222 structure

We systematically synthesized (Cu, M)-1222 cuprates, (Cu1-xMx)Sr-2(Y1 -yCey)(2)Cu2Odelta (M = Ti, V, Cr, Fe, Co, Ga, Ce, Mo, Ce, W and Re), and succeeded for the first time in synthesizing new 1222 compounds with M = Ti, V, Cr, Co, Ge, W and Re. All samples except for the compound with Fe show superconductivity, giving the highest T-c similar to 43 K for annealed M = Re sample ((Cu0.85M0.15)Sr-2(Y0.75Ce0.25)(2)Cu2Oepsilon). We compared the T-c's with the crystal structures and investigated the difference between annealed and as-sintered samples. We point out here that T-c is related to the valencies of the M-elements and the O-Cu-O angle in the CuO2 planes.

• 出版日期1998-7-10