A new high-Tc superconducting intercalation compound

Jin Ho Choy, Nam Gyu Park, Seong Ju Hwang, Young Il Kim

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13 Citations (Scopus)

Abstract

A new high-Tc superconducting intercalation compound, AgIBi2Sr2CaCu2Oy, has been prepared either by reacting the silver metal directly with Bi2Sr2CaCu2Oy powders under P(I2) ∼ 1atm. at 190°C or by the intercalation reaction between the iodine-intercalated Bi2Sr2CaCu2Oy and AgI. According to the X-ray diffraction analysis, the observed basal increase of 7.35 Å upon silver iodide intercalation indicates that the lattice expansion for AgIBi2Sr2CaCu2Oy is twice as large as that for the first-staged iodine-intercalated Bi2Sr2CaCu2Oy (Δd = 3.6 A ̊). Such a result suggests the gallery contains a double layer of iodine. A slight decrease in Tc for the AgIBi2Sr2CaCu2Oy (Tc ≈ 63K) compared to the pristine (Tc ≈ 76K) has been observed by the d.c magnetic susceptibility measurements. The X-ray absorption spectroscopic results show that there is no charge-transfer between guest species (AgI) and host lattice. It confirms again that interblock-coupling has little effect on the superconductivity, since the Tc is not significantly evolved upon AgI intercalation with a large lattice expansion along the c-axis which is perpendicular to the (Cu-O) superconducting layers.

Original languageEnglish
Pages (from-to)1551-1553
Number of pages3
JournalSynthetic Metals
Volume71
Issue number1-3
DOIs
Publication statusPublished - 1995 Apr 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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