Nuclear quadrupole resonance and nuclear magnetic resonance of copper in the high-Tc superconductor YBa2Cu3O7-δ
Abstract
The 65Cu and 63Cu zero-field nuclear quadrupole resonance (NQR), nuclear magnetic resonance (NMR) at 4.7 and 8.5 T and the spin-lattice relaxation time T1 at 8.5 T are measured in the superconducting oxide YBa2Cu3O7-δ between 80 and 300 K. No sign of magnetic order or localized moments are found. The NQR linewidth is strongly dependent on the oxygen content. We assign the 63Cu NQR line at 22 MHz to the Cu site with oxygen coordination 5. T1 is dominated by the quadrupolar relaxation due to spin-phonon coupling.
- Publication:
-
Physical Review B
- Pub Date:
- October 1987
- DOI:
- 10.1103/PhysRevB.36.5690
- Bibcode:
- 1987PhRvB..36.5690F