Muon spin relaxation study on magnetism in high quality single crystal of a high transition temperature superconductor La2−xSrxCuO4−σ (0.11≤x≤0.14)
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The positive muon spin relaxation method is applied to probe magnetic ordering in the superconducting phase of a high quality single crystal of La2−xSrxCuO4−σ (0.11≤x≤0.14). The well characterized crystal ofx=0.11 (Tc=34.5 K) with nearly complete flux exclusion exhibits spin freezing at 8K(Tf) with significant spin fluctuation up to 20 K. The onset of spin fluctuation andTf decrease against increasingx towardsx=0.15, suggesting an existence of a magnetic phase boundary aroundx whereTc becomes maximum.
KeywordsMagnetic Phase Relaxation Method Transition Temperature Superconductor Superconducting Phase Spin Fluctuation
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