AgI-intercalation into Bi2Sr2CaCu2Oz compound

Abstract Polycrystalline AgI-intercalated Bi 2 Sr 2 CaCu 2 O z is prepared and the structure and physical properties studied. The lattice parameters a and c are determined to be 5.40 and 22.8 A, respectively. The expansion of the lattice parameter c is 7.4 A, compared with that of a Bi 2 Sr 2 CaCu 2 O z (Bi2212) specimen ( c/2: 15.4 A ). This expansion is more than twice as large as that of iodine-intercalation (3.6 A). The EPMA measurement shows that the I/Ag ratio in the AgI-intercalated specimen is greater than 1.0. The T c is 69 K, which is lower than that of Bi2212 (75 K) and almost the same as that of IBi 2 Sr 2 CaCu 2 O z (IBi2212, 67 K). The effect of AgI-intercalation on the superconductivity is discussed.