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.
|Number of pages||5|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2000 Sep 1|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics