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Science in China Series A: Mathematics

, Volume 43, Issue 4, pp 400–406 | Cite as

Mössbauer study on Sn-doped (Lal1-x,Srx)2Cu1-x,Snx,O4 superconductors under a new concept

  • Yang Li
  • Guohui Cao
  • Ruifei Duan
  • Guangcan Che
  • Zhongxian Zhao
  • J. A. Larrea J
  • E. M. Baggio-Saitovitch
Article

Abstract

119Sn Mössbauer research is carried out on (La1-xSrx),Cu1-xSnxO4(x = 0.075 and 0.110) superconductors which are designed under a new concept. The Mössbauer spectra results show that Sn occupies Cu position in Sn4+ state, and there is no Sn2+ ion occupying La position. The local lattice deformation near Sn4+ site is small, but displays an increasing tendency with Sn doping. For La2CuO4 matrix, the simultaneous dopings of Sr/Sn induce holes and electrons on CuO2 layer in a new mechanism which influences superconductivity. Under a new mechanism of extra oxygen, the extra oxygen effect of Sn-doping on superconductivity is discussed

Keywords

(La1-xSrx)2 Cu1-xSnxO4 Mössbauer spectra local lattice deformation extra oxygen 

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Copyright information

© Science in China Press 2000

Authors and Affiliations

  • Yang Li
    • 1
    • 2
  • Guohui Cao
    • 1
    • 2
  • Ruifei Duan
    • 1
    • 2
  • Guangcan Che
    • 3
  • Zhongxian Zhao
    • 3
  • J. A. Larrea J
    • 4
  • E. M. Baggio-Saitovitch
    • 4
  1. 1.Department of Materials PhysicsUniversity of Science and Technology BeijingBeijingChina
  2. 2.Laboratory of Nucleus Analysis TechnologyChinese Academy of SciencesBeijingChina
  3. 3.National Superconductor Laboratory of Chinese Academy of SciencesBeijingChina
  4. 4.Centro Brasileiro de Pesquisas Fisicas Rio de JaneiroBrazil

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