Synthesis of new electron-doped cuprates LixSr 2CuO2X2 (X = Cl, Br)

T. Kajita, M. Kato, T. Suzuki, T. Itoh, T. Noji, Y. Koike

Research output: Contribution to journalConference article

5 Citations (Scopus)

Abstract

We have successfully synthesized new electron-doped cuprates Li xSr2CuO2Cl2 with x ≦ 0.10 and LixSr2CuO2Br2 with x ≦ 0.34 using an electrochemical Li-intercalation technique. The electrochemical Li-intercalation has been carried out at room temperature under a constant potential of 500 mV vs. Li/Li+ using a three-electrode cell set up as LixSr2CuO2X2 (X = Cl, Br)|1.0 M LiClO4/PC|Li. A sheet of Li was used as a reference electrode also. The magnetic susceptibility measurements have revealed the appearance of superconductivity in LixSr2CuO2Br2. The superconducting transition temperature, Tc, is 8 K and independent of the Li-content x, while the superconducting volume fraction at 2 K exhibits the maximum at x ∼ 0.15. In addition, no superconductivity has been observed in LixSr2CuO2Cl2.

Original languageEnglish
Pages (from-to)500-504
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume426-431
Issue numberI
DOIs
Publication statusPublished - 2005 Oct 1
Externally publishedYes
EventProceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity -
Duration: 2004 Nov 232004 Nov 25

Keywords

  • Cuprate
  • Electron-doping
  • Li intercalation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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