We report new 0.3 T transverse-field muSR experiments in crystalline Se which show only a small, slowly relaxing muon signal at 300 K, accounting for about 30% of the incoming muon polarization. However, at 90 K signals are observed around 74 and 157 MHz, characteristic of a radical with a hyperfine coupling of 231 MHz. Very fast relaxation which increases with temperature makes these signals impossible to follow beyond 200 K. Above 400 K a quickly relaxing diamagnetic signal becomes visible, its relaxation falling with increasing temperature. In the melt (> 490 K) just a single non-relaxing diamagnetic signal is seen. These observations may be explained by electron spin-exchange with a muoniated radical. (C) 2002 Elsevier Science B.V. All rights reserved.
|Number of pages||5|
|Journal||Physica B: Condensed Matter|
|Publication status||Published - 2003|
|Event||9th International Conference on Muon Spin Rotation, Relaxation and Resonance (MuSR) - Williamsburg, VA, United States|
Duration: 3 Jun 2002 → 7 Jun 2002