Reports 10 and 35 GHz ESR measurements upon single crystals of ScGd doped with 300 and 2400 PPM. The deduced crystal field parameter is D=-330+or-30 G, the Korringa rate b=200+or-40 G K-1, the g value 2.13+or-5 and the conduction electron lattice rate due to the Gd3+ impurity delta eLGd=3*1011 s-s1 at.%-1. The authors' results represent a prime illustration of the Barnes-Plefka exchange narrowing theory both for the bottleneck and non-bottleneck regimes. In particular, they show for the first time the increased narrowing as a consequence of the bottleneck. Also the authors have shown unambiguously that there is a dynamic effect in the line position for this system, and illustrate this by its angular dependence.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Metals and Alloys