6.4

\(\renewcommand\AA{\unicode{x212B}}\)

AFMZF

Description

ZF oscillation for aligned Anti-ferromagnetic magnetic sample with Gaussian dephasing

\[A(t) = \frac{A_0}{2}((1-a_1)+a_1\cos(\omega_1t+\phi))+(1-a_2)+a_2\cos(\omega_2t+\phi))\]

where,

\[a_1 =\sin^2\theta ,\]
\[\omega = 2\pi\nu ,\]

\(\nu\) is the ZF frequency (MHz),

\(\sigma\) is the Gaussian relaxation for oscillatory component,

\(\theta\) is the angle of internal field w.r.t. to applied field,

and \(\phi\) is the phase.

(Source code, png, hires.png, pdf)

../../_images/AFMZF-1.png

Properties (fitting parameters)

Name Default Description
A0 0.2 Amplitude
Freq 1.0 ZF Frequency (MHz)
Angle 50.0 Angle of internal field w.r.t. to applied field (degrees)
Sigma 0.2 Gaussian relaxation for oscillatory component
Phi 0.0 Phase (rad)

Source

Python: AFMZF.py