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#!/usr/bin/env python3
# /// script
# requires-python = ">=3.10"
# dependencies = ["bornagain>=25,<26"]
# ///
"""
Polarized GISAS (PM spin-flip channel) of a rotated magnetic sphere.
A sphere with x-oriented magnetisation is rotated 20° around Z and
suspended in a substrate with y-oriented magnetisation. The out-of-plane
magnetisation component opens a spin-flip channel (PM: +Z polariser,
-Z analyser).
"""
import bornagain as ba
ba.require_versions("bornagain>=25,<26")
from bornagain import deg, nm, R3
def get_sample():
vacuum = ba.Vacuum()
substrate_color = (0.28, 0.57, 0.82)
substrate_mat = ba.RefractiveMaterial("Substrate", substrate_color, 7e-6, 2e-8,
R3(0, 1e6, 0))
particle_color = (0.86, 0.24, 0.18)
particle_mat = ba.RefractiveMaterial("MagParticle", particle_color, 6e-4, 2e-8,
R3(1e6, 0, 0))
ff = ba.Sphere(5*nm)
particle = ba.Particle(particle_mat, ff)
particle.rotate(ba.RotationZ(20*deg))
vacuum_layer = ba.Layer(vacuum)
substrate_layer = ba.Layer(substrate_mat)
substrate_layer.suspend2D(ba.Dilute2D(0.001, particle))
sample = ba.Sample()
sample.addLayer(vacuum_layer)
sample.addLayer(substrate_layer)
return sample
def get_simulation(sample):
beam = ba.Beam(1e9, 0.1*nm, 0.2*deg)
n = 200
detector = ba.SphericalDetector(n, -2*deg, 2*deg, n, 0, 2*deg)
beam.setPolarization(R3(0, 0, 1))
detector.setAnalyzer(R3(0, 0, -1))
return ba.ScatteringSimulation(beam, sample, detector)
if __name__ == '__main__':
sample = get_sample()
ba.showSample3D(sample, sample_size=120*nm, seed=0)
simulation = get_simulation(sample)
result = simulation.simulate()
ba.plot_datafield(result, unit_aspect=1)
ba.plt.show()
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BornAgain
≻ git-develop
≻ Documentation ≻ Examples ≻ GISAS ≻ Magnetic scattering ≻ Magnetic rotation ZPM
