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

研究成果: Article

21 引用 (Scopus)

抄録

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.

元の言語English
記事番号014506
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
82
発行部数1
DOI
出版物ステータスPublished - 2010 7 7
外部発表Yes

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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

これを引用

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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.",
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T1 - Muon spin relaxation study of the Cu spin dynamics in electron-doped high- Tc superconductor Pr0.86 LaCe0.14 Cu1-y Zn yO4

AU - Risdiana,

AU - Adachi, T.

AU - Oki, N.

AU - Koike, Y.

AU - Suzuki, Takao

AU - Watanabe, I.

PY - 2010/7/7

Y1 - 2010/7/7

N2 - 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.

AB - 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.

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