We have succeeded in synthesizing electron-doped polycrystalline bulk samples of TA-La1.8Eu0.2CuO4−yFy (y = 0-0.15) by the fluorination of undoped (Ce-free) TA-La1.8Eu0.2CuO4 using NH4F. The magnetic susceptibility measurements have revealed that the superconducting transition temperature, Tc, increases with increasing y, exhibits the maximum of 23K at y = 0.025, and decreases. The dome-like dependence of Tc on the doped carrier concentration in the TA-type (La,Eu)-based cuprates is explained in terms of the pairing mediated by spin fluctuations based on the d-p model calculation.
ASJC Scopus subject areas
- Physics and Astronomy(all)