Field-Induced Uniform Antiferromagnetic Order Associated with Superconductivity in Pr${}_{1-x}$LaCe${}_x$CuO${}_{4-\delta }$

Abstract

Strong correlation between field-induced antiferromagnetic (AF) order and superconductivity is demonstrated for an electron-doped cuprate superconductor, Pr${}_{1-x}$LaCe${}_x$CuO${}_{4-\delta }$ (PLCCO). In addition to the specimen with $x=0.11$ (which is close to the AF phase boundary, $x\simeq 0.10$), we show that the one with $x=0.15$ ($T_c\simeq 16$ K at zero field) also exhibits the field-induced AF order with a reduced magnitude of the induced moment. The uniform muon Knight shift at a low magnetic field ($\sim 10^2$ Oe) indicates that the AF order is not localized within the cores of flux lines, which is in a marked contrast with theoretical prediction for hole-doped cuprates. The presence of anomalous non-diagonal hyperfine coupling between muons and Pr ions is also demonstrated in detail.

8 pages, 5 figures, to be published in J. Phys. Soc. Jpn

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Cited by in corpus (4)

• Progress and perspectives on the electron-doped cuprates
• Muon spin rotation studies of electronic excitations and magnetism in the vortex cores of superconductors
• Superconductivity and Field-Induced Magnetism in SrFe_1.75Co_0.25As_2
• Quantum spin correlations through the superconducting-normal phase transition in electron-doped superconducting Pr0.88LaCe0.12CuO4-d