Abstract
Nuclear quadrupole relaxation was observed for extremely dilute Ce140 ions implanted in highly oriented pyrolytic graphite by means of the time-differential perturbed angular correlation technique. The temperature-dependent relaxation of the directional anisotropy implies a thermally activated motion of the probe nuclei relative to the extranuclear field with the activation energy of 0.029(3) eV. As regards the electronic property, it is strongly suggested from a measurement under an external magnetic field that the Ce140 ions in motion are in the state of Ce3+.
| Original language | English |
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| Article number | 214302 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 74 |
| Issue number | 21 |
| DOIs | |
| State | Published - 2006 |
| Externally published | Yes |