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

R. Kadono; K. Ohishi; A. Koda; S. R. Saha; W. Higemoto; M. Fujita; K. Yamada

doi:10.1143/JPSJ.74.2806

paper

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

arXiv:cond-mat/0508124 · doi:10.1143/JPSJ.74.2806

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 $_{4 - δ}$ (PLCCO). In addition to the specimen with $x = 0.11$ (which is close to the AF phase boundary, $x ≃ 0.10$ ), we show that the one with $x = 0.15$ ( $T_{c} ≃ 16$ 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 ( $\sim 1 0^{2}$ 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

Field-Induced Uniform Antiferromagnetic Order Associated with Superconductivity in Pr1−x​LaCex​CuO4−δ​

Abstract

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