Relaxation parameters for the reported compounds. Fits considering only the Orbach relaxation process were obtained by fitting the high-temperature parts of ln τ vs. 1/T at the corresponding BDC fields. Comprehensive fitting analysis of ln τ vs. 1/T involves simultaneous fittings at two BDC fields.
| Compound, Model | U (K) | τ 0 (ns) | τ QTM (ms) | a (Tm K s)−1 |
|---|---|---|---|---|
| m | ||||
| 1, Orbacha at 0.06 T | 40 | 12 | — | — |
| — | ||||
| 1, Orbacha at 0.08 T | 40 | 11 | — | — |
| — | ||||
| 1, Orbach & direct & QTb | 48.2 | 2.0 | 2 | 4 × 104 |
| 4 (fixed) | ||||
| 2, Orbachc at 0.09 T | 38 | 4 | — | — |
| — | ||||
| 2, Orbachc at 0.125 T | 36 | 8 | — | — |
| — | ||||
| 2, Orbach & direct & QTd | 41 | 2.2 | 1.3 | 4 × 104 |
| 4 (fixed) |
a
For data in the range 3.5–4.7 K.
b
At 0.06 T and 0.08 T.
c
For data in the range 3.3–4.1 K.
d
At 0.09 T and 0.125 T.