Abstract
We have performed muon spin relaxation (μSR), resistivity and magnetic susceptibility measurements under high pressure for La2−xBaxCuO4 with x = 0.135. An oscillation component is observed in the μSR spectra at low temperatures under ambient pressure and pressure of 1.1 GPa. This result suggests that the low‐temperature tetragonal (LTT) structure is dispensable for the appearance of the magnetic order, since several experimental results indicate that the LTT structure vanishes at 1.1 GPa. The superconducting temperature Tc increases drastically with increasing pressure, while the magnetic ordering temperature Tm hardly depends on pressure. The suppression of Tc therefore has no correlation with Tm. However, by applying pressure, the magnetic ordering region is replaced by the superconducting region. We speculate that the suppression of Tc correlates with the magnetic volume fraction.
Published Version
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