Table 2.
Coordination number (N), DWF (σ2) and NN Cu-O bond length (R) obtained from fitted temperature-dependent EXAFS spectra at Cu K-edge for θ = 0° and 70°.
| Temperature | E//ab-plane (θ = 0°) | E//c-axis (θ = 70°) | ||||
|---|---|---|---|---|---|---|
| N | R (Å) | σ2 (×10−3 Å−2) | N | R (Å) | σ2 (×10−3 Å−2) | |
| 300 K | 4 | 1.95 ± 0.02 | 3.6 ± 0.3 | 1.2 | 2.20 ± 0.02 | 6.1 ± 0.3 |
| 200 K | 4 | 1.95 ± 0.02 | 2.1 ± 0.3 | 1.2 | 2.20 ± 0.02 | 5.2 ± 0.3 |
| 175 K | 4 | 1.96 ± 0.02 | 1.7 ± 0.3 | 1.2 | 2.20 ± 0.02 | 4.6 ± 0.3 |
| 150 K | 4 | 1.95 ± 0.02 | 1.0 ± 0.3 | 1.2 | 2.20 ± 0.02 | 3.1 ± 0.3 |
| 125 K | 4 | 1.94 ± 0.02 | 0.3 ± 0.3 | 1.2 | 2.20 ± 0.02 | 2.1 ± 0.3 |
| 115 K | 4 | 1.94 ± 0.02 | 0.5 ± 0.3 | 1.2 | 2.20 ± 0.02 | 0.8 ± 0.3 |
| 100 K | 4 | 1.95 ± 0.02 | 0.3 ± 0.3 | 1.2 | 2.20 ± 0.02 | 0.6 ± 0.3 |