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# DecoupAsymPowderMagRot¶

## Description¶

The Decoupling of asymmetry in the ordered state of a powdered magnet fit function for rotational asymmetry can be written as:

$y = a*(1-A_z({\frac{x}{B0}}))$

where:

• $$a$$ - a scaling parameter for the overall asymmetry

• $$B0$$ - the characteristic field

• $$A_z(b) = {\frac{3}{4}} - {\frac{1}{4b^2}} + {\frac{(b^2-1)^2}{8b^3}}log|{{\frac{b+1}{b-1}}}|$$

For a longitudinal polarization use DecoupAsymPowderMagLong .

## Examples¶

An example of when this might be used is for examining field dependence of $$\mu$$ SR signals in a polycrystalline magnet[1].

## Properties (fitting parameters)¶

Name

Default

Description

Asymmetry

1.0

a scaling parameter for the overall asymmetry

CharField

1.0

the characteristic field

## References¶

[1] Pratt, F.L. (2007). Field dependence of $$\mu$$ SR signals in a polycrystalline magnet. Journal of Physics:Condensed Matter, Vol. 19 No. 45, doi:10.1088/0953-8984/19/45/456207 .

Categories: FitFunctions | Muon\MuonModelling\Magnetism