Abstract
We report Cu63 nuclear-quadrupolar-resonance spectra and nuclear-spin relaxation data for the oxygen-deficient phase YBa2Cu3O6.7. Compared with YBa2Cu3O7.0, the spin-lattice relaxation rates are reduced by more than three orders of magnitude for a class of sites identified as nonmetallic Cu(1) "chain" sites with twofold oxygen coordination. Generation of these 3d10 Cu+ sites by ordering of oxygen vacancies onto "empty" chains increases the carrier concentration and may help maintain the observed 60-K plateau in the variation of Tc with oxygen concentration.
Original language | English (US) |
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Pages (from-to) | 831-834 |
Number of pages | 4 |
Journal | Physical Review B |
Volume | 39 |
Issue number | 1 |
DOIs | |
State | Published - 1989 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics