Table 1.
Positron lifetimes with corresponding intensities for Fe, Co and FeCo.
| Sample details | τ1(ps) | I1% | τ2 (ps) | I2% | τ3 (ps) | I3% | τm (ps) |
|---|---|---|---|---|---|---|---|
| τ4 (ns) | I4% | ||||||
| Fe powder | 158 (4) | 63 (3) | 323 (18) | 33 (2) | 622 (55) | 4 (1) | 215 |
| Co power | 145 (6) | 61 (6) | 274 (26) | 31 (4) | 514 (27) | 8 (2) | 188 |
| Fe rod | 140 (1) | 86 (1) | 268 (6) | 14 (1) | 0 | 0 | 158 |
| Co rod | 156 (1) | 95 (1) | 283 (19) | 5 (1) | 0 | 0 | 162 |
| FeCo as prepared | 180 (10) | 9.5 (1) | 345 (1.1) | 87.5 (1) | 1852 (172) | 0.5 (0.01) | 329 |
| 54 (0.4) | 2.5 (0.1) | ||||||
| FeCo annealed at 700 °C | 133 (7) | 38 (2.8) | 284 (6.7) | 59 (2) | 698 (31) | 3 (0.5) | 225 |
| FeCo annealed at 800 °C | 133 (2.6) | 59.5 (1.5) | 292 (4.7) | 39.6 (1) | 959 (61) | 0.9 (0.1) | 197 |