ISSN:
1572-9540
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Recent measurements on NiO and CoO show a complex temperature dependence. In this work, the local μ+ fields are examined over an extended temperature range. Only one precession frequency of 61.3 MHz was observed in the μ+ spin precession in zero field in NiO, similar to the case in MnO. The signal broadens at 200 K and is difficult to observe above 250 K. In contrast, in CoO, at least three lines are observed: two sharp lines at 54.2 MHz, and at 78 MHz, with an additional small peak at 162 MHz. Above 40 K, the 54.2 MHz signal (CoO) vanishes, but the 78 MHz signal survives to 110 K. However, at 270–280 K, a new signal at 13 MHz is also observed. Dipole field calculations of these 3d‐oxides (MnO, NiO and CoO) for various lattice sites (symmetric sites and O‐bonded positions) are examined and compared with the experimental results, with considerations toward the dynamics of the muons.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1012681305657
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