1994/11/02 by Raivo Stern, R. Stern, M. Mali +2 · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #cond-mat.supr-con #supr-con
paper · pdf · doi:10.1103/physrevb.51.15478
published as Phys. Rev. B 51, 15478--15483 (1995) · 7 pages, REVTEX 3.0, 5 figures available upon request
arxiv created 1994/11/02 · openalex publication_date 1995/06/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We report measurements of the Gaussian contribution T2G to the plane 63Cu nuclear spin-spin relaxation time in the YBa2Cu3O7 and YBa2Cu4O8 blocks of normal and superconducting Y2Ba4Cu7O15. The data confirm our previous results that adjacent CuO2 planes have different doping levels and that these planes are strongly coupled. The static spin susceptibility at the antiferromagnetic wave vector exhibits a Curie-Weiss-like temperature dependence in the normal state. The Y2Ba4Cu7O15 data are incompatible with a phase diagram based on a single CuO2 plane theory but point to the importance of the interplane coupling in the spin-gap formation. Additional data for YBa2Cu4O8 and YBa2Cu3O6.982 are in acord with the single-plane theory. The temperature dependence of T2G,ind below Tc excludes isotropic s-wave superconductivity in all three compounds.