μSR study of the Cu-spin dynamics in the electron-doped high-T c cuprate of Pr0.86LaCe0.14Cu 1-y(Zn,Ni)yO4

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

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

Effects of the Zn- and Ni-substitution 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 have been studied using zero-field muon-spin-relaxation (μSR) measurements at temperatures down to 2 K. For the as-grown sample (δ=0, y=0) and the sample with a very small δ value (δ<0.01, y=0), a muon-spin precession due to long-range antiferromagnetic order has been observed. On the other hand, no precession has been observed for moderately oxygen-reduced samples (0.01≤δ≤0.09). It has been found that for all the samples of 0.01≤δ≤0.09 the asymmetry A(t) (μSR time spectrum) in the long-time region increases with decreasing temperature at low temperatures, suggesting possible slowing down of the Cu-spin fluctuations. On the other hand, no significant difference between Zn- and Ni-substitution effects on the slowing down of the Cu-spin fluctuations has been observed.

Original languageEnglish
Pages (from-to)218-220
Number of pages3
JournalPhysica B: Condensed Matter
Volume374-375
DOIs
Publication statusPublished - 2006 Mar 31
EventProceedings of the Tenth International Conference on Muon Spin Rotation, Relaxation and Resonance -
Duration: 2005 Aug 82005 Aug 12

Keywords

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

ASJC Scopus subject areas

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

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