Anomalous slowing down of Cu-spin fluctuations observed by muon spin relaxation in the Zn-substituted Bi2Sr2Ca1-xYx(Cu1-yZny)2O8+δ system around the hole concentration of 1/8 per Cu

I. Watanabe, M. Akoshima, Y. Koike, K. Nagamine

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Abstract

Muon spin relaxation (μSR) measurements were applied to a partially Zn-substituted Bi-2212 system, Bi2Sr2Ca1-xYx(Cu1-yZny)2O8+δ, to study a possibility of the existence of the so-called “1/8 effect” which has been established in La systems. The muon spin depolarization rate has been found to increase with decreasing temperature below 10 K in Zn-substituted samples around the hole concentration p=1/8 per Cu where the high-Tc superconductivity is anomalously suppressed. It has been revealed that the enhancement of the muon spin depolarization rate is attributed to the slowing down of the Cu-spin fluctuations and that both Zn substitution and p=1/8 per Cu are essential for the slowing down of the Cu-spin fluctuations. Although no three-dimensional long-range coherent ordering of the Cu spins appeared down to 0.30 K, the present μSR results support the existence of the 1/8 effect in a Bi-2212 system also.

Original languageEnglish
Pages (from-to)R9955-R9958
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number14
DOIs
Publication statusPublished - 1999 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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