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#!/usr/bin/env python3
"""
Basic example for producing a profile of SLD of a multilayer.
"""
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_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)
# creating multilayer
multi_layer = ba.MultiLayer()
multi_layer.addLayer(ambient_layer)
for i in range(4):
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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