1D-ACAR Spectra of YBa2-xSrxCu3Oy
- Received Date: 1900-01-01
- Accepted Date: 1900-01-01
- Available Online: 1991-11-05
Abstract: The measurements of one-dimensional angular correlation of positron annihilation radiation (1D-ACAR) spectra,superconducting critical temperature,lattice parameters and oxygen contents have been made on YBa2-xSrxCu3Oy high temperature supercnductor system.It was found that the substitution of Sr for Ba weakens the orthorhombic symmery,suppresses TC,hardly changes oxygen content and does not disturb the electronic structure of Cu-O chains.Based on the above results.the authors propose that the localized electronic structure of Cu-O plane is a dominating factor for high temperature superconductivity in 1:2:3 phase superconductors.