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Keren’s generalization of the Abragam relaxation function to a longitudinal field, for fitting the time-dependent muon polarization.
The function is derived in *Phys Rev B, vol. 50, 14, 10039-42 (1994)* and is given by
where the relaxation rate \(\Gamma(t)\) is
\(A = P_z(0)\) is the polarization at time zero, \(\nu\) is the fluctuation rate (inverse correlation time), \(\Delta\) is the distribution width of the local fields and \(\omega_L\) is the Larmor frequency (longitudinal field times muon gyromagnetic ratio).
Name | Default | Description |
---|---|---|
A | 1.0 | Polarization at time zero |
Delta | 0.2 | Distribution width of local fields (MHz) |
Field | 50.0 | Longitudinal field (Gauss) |
Fluct | 0.2 | Hopping rate (inverse correlation time, MHz) |
Categories: FitFunctions | Muon\MuonSpecific