Magnetic and superconducting phase diagram of electron-doped Pr$_{1-x}$LaCe$_{x}$CuO$_{4}$

Details Magnetic and superconducting phase diagram of electron-doped Pr$_{1-x}$LaCe$_{x}$CuO$_{4}$ Magnetic and superconducting phase diagram of electron-doped Pr$_{1-x}$LaCe$_{x}$CuO$_{4}$

2002-03-15

arxiv.org/abs/cond-mat/0203320v2

Phys. Rev. B 67, 014514 (2003)

Physics

Condensed Matter

Superconductivity

4 pages, 4figures

Scientific paper

10.1103/PhysRevB.67.014514

We have investigated the magnetism and the superconductivity of an electron-doped Pr$_{1-x}$LaCe$_{x}$CuO$_{4}$ (PLCCO) using single crystal and powder samples by means of zero-field muon spin rotation/relaxation (ZF-$\mu$SR) and magnetic susceptibility measurements. Muon spin rotation corresponding to antiferromagnetic (AF) order was observed in the sample with 0.04$\leq${\it x}$\leq$0.11. Changes in magnetic properties of Cu spins upon Ce doping were revealed because the effect of the rare earth moment was negligible. Bulk superconductivity was identified in a wide Ce concentration range of 0.09$\leq${\it x}$\leq$0.20 with a maximum transition temperature of 26 K. At low temperatures, the superconducting (SC) phase abruptly appears by doping with linking quick destroy of the AF ordered phase at {\it x}$\sim$0.09, indicating the competitive relation between two phases.

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