Anomalous muon-spin relaxation in the Zn-substituted YBa2Cu3-2yZn2yO7-δ around the hole concentration of 1/8 per Cu

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

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34 Citations (Scopus)

Abstract

Muon-spin relaxation (μSR) measurements were carried out in the partially Zn-substituted Y-123 system, YBa2Cu3-2yZn2yO7-δ, to investigate the so-called 1/8 effect. The muon-spin depolarization rate has been found to be anomalously enhanced at low temperatures in the Zn-substituted samples around the hole concentration per Cu in the CuO2 plane p ≁ 1/8, as observed in the case of the Zn-substituted Bi2Sr2Ca1-xYx(Cu1-yZn y)2O8+δ with p ∼ 1/8. This indicates slowing down of the Cu-spin fluctuations at p ∼ 1/8. It appears that a small amount of Zn ions are effective for the enhancement of the magnetic correlation between Cu spins at p ∼ 1/8. It has been concluded that the 1/8 effect exists in the Y-123 system and is common to all high-Tc cuprates.

Original languageEnglish
Pages (from-to)6761-6765
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number10
DOIs
Publication statusPublished - 2000 Sep 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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