Abstract
In order to investigate the origin of so-called 1/8 anomaly in La(Sr,Ba)-214, we have performed μSR experiments for the low-temperature orthorhombic (LTO) and low-temperature tetragonal (LTT) structure phases in La2−xSrxCu1−yZnyO4 (LSCO) and La2−xBaxCu1−yZnyO4 (LBCO), and decided the magnetic order temperature Tm where μ-spin coherent rotation starts. 1% Zn-substitution depresses magnetic order in the LTT phase of LBCO while it induces or enhances magnetic order in the LTO phase of LSCO. With doping Tm rises first and keeps constant around x=1/8 and decreases in both Zn-substituted LSCO and LBCO. This implies that doped holes are never uniformly distributed on the CuO2 plane, suggesting the segregation of spin and hole around x=1/8.
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