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#!/usr/bin/env python3
"""
Example for producing a profile of SLD of a multilayer with particles
and slicing.
"""
import bornagain as ba
from bornagain import deg, angstrom, nm
import numpy as np
import matplotlib.pyplot as plt
def get_sample():
"""
Defines sample and returns it
"""
# creating materials
m_ambient = ba.MaterialBySLD("Ambient", 0, 0)
m_ti = ba.MaterialBySLD("Ti", -1.9493e-06, 0)
m_ni = ba.MaterialBySLD("Ni", 9.4245e-06, 0)
m_particle = ba.MaterialBySLD("Particle", 5e-6, 0)
m_substrate = ba.MaterialBySLD("SiSubstrate", 2.0704e-06, 0)
# creating layers
ambient_layer = ba.Layer(m_ambient)
ti_layer = ba.Layer(m_ti, 30*angstrom)
ni_layer = ba.Layer(m_ni, 70*angstrom)
substrate_layer = ba.Layer(m_substrate)
# create roughness
roughness = ba.LayerRoughness(5*angstrom, 0.5, 10*angstrom)
# create particle layout
ff = ba.FormFactorCone(5*nm, 10*nm, 75*deg)
particle = ba.Particle(m_particle, ff)
layout = ba.ParticleLayout()
layout.addParticle(particle)
iff = ba.InterferenceFunction2DLattice(ba.SquareLattice2D(10*nm, 0))
layout.setInterferenceFunction(iff)
ambient_layer.addLayout(layout)
ambient_layer.setNumberOfSlices(20)
# creating multilayer
multi_layer = ba.MultiLayer()
multi_layer.addLayer(ambient_layer)
for i in range(2):
multi_layer.addLayerWithTopRoughness(ti_layer, roughness)
multi_layer.addLayerWithTopRoughness(ni_layer, roughness)
multi_layer.addLayer(substrate_layer)
return multi_layer
if __name__ == '__main__':
sample = get_sample()
zpoints, slds = ba.materialProfile(sample)
plt.figure()
plt.plot(zpoints, np.real(slds))
plt.show()
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