We have investigated in detail dependence on p (the hole concentration per Cu) of the transport properties and Tc in the excess-oxygen-doped La2-xAxCuO4+δ (A = Nd, Bi, Pr), where the phase separation of the excess oxygen is suppressed. The so-called 1/8 anomaly has been found in La1.8Nd0.2 CuO4+δ. The 1/8 anomaly has become marked through the 1% substitution of Zn for Cu. The μSR measurements have revealed that the magnetic correlation develops at low temperatures below about 40 K in both Zn-free and 1% Zn-substituted samples with p = 1/8 and that a long-range magnetic order is formed below 1 K in the 1% Zn-substituted sample with p = 1/8. These results support the stripe-pinning model. Neither La2-xBixCuO4+δ nor La2-xPrxCuO4+δ has exhibited the clear 1/8 anomaly.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Materials Science(all)
- Condensed Matter Physics