We have performed transverse field muon spin rotation experiments on a single-crystal La1.93Sr0.07CuO4, which is close to the critical value x = 0.06, in the field range from 1 to 60 kOe in order to investigate the relation between magnetism and superconductivity in an underdoped high-Tc superconductor. The measured sample shows evidence of static magnetism at Tg ∼ 4 K, far below the superconducting transition temperature Tc = 17 K. We measured the shift and the linewidth of the fast-Fourier transform (FFT) spectra obtained in a high field of 60 kOe, both of which are dominated by Cu - 3 d spins. The temperature dependences of the shift and the linewidth indicate the development of modulated staggered correlations below 100 K. We conclude that the static staggered correlations coexist with superconductivity far below Tc.
- Cobalt oxide
- Spin fluctuations
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics