57Fe Nuclear Transverse Relaxation Times in Fe and some Fe-Rich Alloys: Suhl-Nakamura Interaction
- 1 March 1969
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 40 (3), 1485-1486
- https://doi.org/10.1063/1.1657734
Abstract
We have shown previously by pulsed NMR experiments that in the domain walls of pure Fe the main mode of the nuclear longitudinal relaxation process, T1, is due to the emission or absorption of a single magnon. Here we report on the behavior of the transverse relaxation, T2. In pure Fe, at 4.2°K and higher temperatures, again the main mode of transverse relaxation is emission or absorption of a single real magnon. However, in Fe alloys with 1–4 atomic percent Al or Co, T1≫T2 at 4.2°K, indicating that some other relaxation mechanism is dominant. Here the spin‐spin exchange interaction of the Suhl‐Nakamura type appears to be the main mode of transverse relaxation.Keywords
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