Magnetic Ground State of Pr$_{0.89}$LaCe$_{0.11}$CuO$_{4+α-δ}$ with Varied Oxygen Depletion Probed by Muon Spin Relaxation

Details Magnetic Ground State of Pr$_{0.89}$LaCe$_{0.11}$CuO$_{4+α-δ}$ with Varied Oxygen Depletion Probed by Muon Spin Relaxation Magnetic Ground State of Pr$_{0.89}$LaCe$_{0.11}$CuO$_{4+α-δ}$ with Varied Oxygen Depletion Probed by Muon Spin Relaxation

2003-05-23

arxiv.org/abs/cond-mat/0305548v1

J. Phys. Soc. Jpn. 72, 2955 (2003)

Physics

Condensed Matter

Superconductivity

6 pages, 4 figures, submitted to J. Phys. Soc. Jpn

Scientific paper

10.1143/JPSJ.72.2955

The magnetic ground state of an electron-doped cuprate superconductor Pr$_{1-x}$LaCe$_x$CuO$_{4+\alpha-\delta}$ ($x=0.11, \alpha\simeq0.04$) has been studied by means of muon spin rotation/relaxation (\msr) over a wide variety of oxygen depletion, $0.03\le\delta\le0.12$. Appearance of weak random magnetism over entire crystal volume has been revealed by a slow exponential relaxation. The absence of $\delta$-dependence for the random magnetism and the multiplet pattern of muon Knight shift at higher fields strongly suggest that the random moments are associated with excited Pr$^{3+}$ ions under crystal electric field.

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