Electron Spin Resonance in Dilute Magnetic Alloys.
Technical conference paper,
CALIFORNIA UNIV LOS ANGELES DEPT OF PHYSICS
Pagination or Media Count:
A summary is given of the theory of electron paramagnetic resonance ESR in dilute magnetic alloys. The conditions for the existence of the so-called ESR bottleneck are precisely stated. The frequency and temperature dependent exchange relaxation rates between the localized and conduction electron spins are exhibited. It is shown that, at very low temperatures, the frequency dependence of these rates can be used to break the bottleneck on the low frequency side of the resonance line. This allows for a direct measurement of the exchange coupling in alloys which, at usual helium temperatures, would be strongly bottlenecked and not exhibit exchange widths or shifts. The effect of the ESR bottleneck on the hyperfine splitting of a localized moment in a metal is also discussed. Author
- Solid State Physics