Absence of the impurity-induced magnetic order in the electron-doped high-Tc cuprates Pr0.86LaCe0.14Cu 1-y(Zn, Ni)yO4

Risdiana, T. Adachi, Y. Koike, I. Watanabe, K. Nagamine

Research output: Contribution to journalConference article

5 Citations (Scopus)

Abstract

Zero-field muon-spin-relaxation measurements have been carried out in order to investigate the Zn- and Ni-substitution effects on the Cu-spin dynamics in the electron-doped Pr0.86LaCe0.14Cu1-y(Zn, Ni)yO4+α-δ with y = 0, 0.01, 0.02, 0.05 and different values of the reduced oxygen content δ (δ ≦ 0.09). For the samples with y = 0 and very small δ values of δ < 0.01, a muon-spin precession due to the formation of a long-range antiferromagnetic order has been observed at low temperatures below ∼5 K. For the moderately oxygen-reduced samples of 0.01 ≦ δ ≦ 0.09, on the contrary, no muon-spin precession has been observed and the temperature dependence of the spectra is similar to one another regardless of the y value. That is, no impurity-induced slowing down of the Cu-spin fluctuations has been detected, which is very different from the results of the hole-doped high-Tc cuprates. The reason is discussed.

Original languageEnglish
Pages (from-to)355-359
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume426-431
Issue numberI
DOIs
Publication statusPublished - 2005 Oct 1
EventProceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity -
Duration: 2004 Nov 232004 Nov 25

Keywords

  • Cu-spin dynamics
  • Electron-doped high-T cuprate
  • Impurity effects
  • μSR

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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