Muon spin relaxation study of the Cu spin dynamics in electron-doped high- Tc superconductor Pr0.86 LaCe0.14 Cu1-y Zn yO4

Risdiana, T. Adachi, N. Oki, Y. Koike, Takao Suzuki, I. Watanabe

Research output: Contribution to journalArticle

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Abstract

Muon-spin-relaxation (μSR) measurements have been performed for the partially Zn-substituted electron-doped high- Tc superconductor Pr 0.86 LaCe0.14 Cu1-y ZnyO 4+α-δ with y=0-0.05 and the reduced oxygen content δ=0-0.09, in order to investigate nonmagnetic Zn-impurity effects on the Cu-spin dynamics. For all the measured samples with 0.01≤δ≤0.09, it has been found that a fast depolarization of muon spins is observed below 100 K due to the effect of Pr3+ moments and that the μSR time spectrum in the long-time region above 5 μsec increases with decreasing temperature at low temperatures below 30 K possibly due to slowing down of the Cu-spin fluctuations assisted by Pr3+ moments. No Zn-induced slowing down of the Cu-spin fluctuations has been observed for moderately oxygen-reduced samples with 0.04≤δ≤0.09, which is very different from the μSR results of La2-x Srx Cu1-y Zny O 4. The possible reason may be that there are no dynamical stripe correlations of spins and electrons in the electron-doped high- Tc cuprates or that the effect of Pr3+ moments on the μSR spectra is stronger than that of a small amount of Zn impurities.

Original languageEnglish
Article number014506
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number1
DOIs
Publication statusPublished - 2010 Jul 7
Externally publishedYes

Fingerprint

Spin dynamics
spin dynamics
Superconducting materials
Spin fluctuations
muons
Electrons
Impurities
Oxygen
electrons
Depolarization
Relaxation time
moments
Temperature
impurities
oxygen
depolarization
cuprates
relaxation time

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Muon spin relaxation study of the Cu spin dynamics in electron-doped high- Tc superconductor Pr0.86 LaCe0.14 Cu1-y Zn yO4 . / Risdiana; Adachi, T.; Oki, N.; Koike, Y.; Suzuki, Takao; Watanabe, I.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 82, No. 1, 014506, 07.07.2010.

Research output: Contribution to journalArticle

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