Muon-spin-relaxation (μSR) measurements were applied to the partially Zn-substituted Bi-2212 system, Bi2Sr2Ca1-xYx(Cu1-y Zny)2O8+δ, to study the Cu-spin state in a wide range of the hole concentration, p. Singularity of the magnetic correlation between Cu spins at p∼1/8 per Cu has been confirmed clearly, proving the existence of the so-called "1/8 effect" in the Bi-2212 system. The muon-spin depolarization rate of the Zn-substituted sample with p∼1/8 per Cu (x=0.3125 and y=0.025) at 0.30 K has been found to exhibit nearly a root-square dependence on the magnetic field applied along the initial muon-spin direction. This field dependence can be explained by assuming that a magnetically excited state of Cu spins moves in a one-dimensional direction producing fluctuating internal fields at the muon sites. The present μSR measurements may support the existence of the stripe correlations of spins and holes in the Bi-2212 system also.
|Number of pages||7|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2000 Dec 1|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics