### Plotting the sample profile

This short tutorial demonstrates how to visualize the Scattering Length Density (SLD) profile of a Multilayer sample. For more details about preparing a sample and carrying on a reflectometry simulated experiment, read the reflectometry simulation tutorial.

To obtain the figure above, one must run the script below, which is basically about defining a sample with interfacial roughness and plotting right away its sld profile.

  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50  #!/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, 0.0) m_ti = ba.MaterialBySLD("Ti", -1.9493e-06, 0.0) m_ni = ba.MaterialBySLD("Ni", 9.4245e-06, 0.0) m_substrate = ba.MaterialBySLD("SiSubstrate", 2.0704e-06, 0.0) # 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() 
MaterialProfile.py