Dataset DOI: 10.5061/dryad.4tmpg4frb

Description of the data and file structure

Data was collected for X-ray-based double slit diffraction. The idea was to experimentally determine the fringe shift happening due to a change in the refractive index of a magnetic material under a magnetic field. 

Files and variables

Summary of Figure Data

This dataset contains:

1. Fig 1b data: The data is a 1D linecut of the intensity interference-diffraction pattern. The normalized CCD data and normalized fit values are included and plotted against detector distance.
2. Fig 2 data: The data obtained from the registration algorithm to yield the fringe shifts for LCP and RCP light. The other data columns include derived values such as RCP - LCP. These values are scaled to show the fringe shift in terms of electron scattering factors.
3. Fig 3 data: Here, the data in the main panel is that of the beta value fits as a function of beam line energy obtained from the fitting algorithm. The inset is the absorption data obtained experimentally. 
4. Fig 4 data: The inset shows the results of the registration algorithm values for the beam line energy scans. The main panel is the derivative of that data with respect to beam line energy to obtain the L3 absorption peak.

File: data_description.rtf

Description: A copy of the prior summary description in rich-text format

File: fig1b_data.csv

Description: A 1-dimensional line cut of the intensity pattern recorded by the CCD camera. The linecut was obtained by taking a small region along the x-axis (perpendicular to the pattern) and across the entire y-axis (along the pattern). The intensity data was normalized and is therefore scaled from 0 to 1. Using the fitting algorithm, we also plotted the fit values of the intensity to verify the obtained intensity function from Fraunhofer diffraction.

Variables:

Fit values: Obtained fit values of the intensity distribution along the y-axis.Data: The normalized data of the intensity distribution along the y-axis.

Distance: The distance values across the y-axis on the CCD camera.

File: fig2_data.csv

Description: The registration algorithm tracked the physical movement of the fringes as the external magnetic field was varied in the out-of-plane direction with respect to the sample (z-axis). The data was recorded for LCP and RCP light. The dichroic signal (RCP - LCP) was also obtained. The fringe shift values were overlayed with curves that were smoothed using the Savitzky-Golay filter to emphasize the hysteresis loop behavior. The remainder of the data includes these fringe shift values scaled in terms of dispersive part of the refractive index.

Variables:

ΔY LCP: Lateral fringe shift of LCP light in µm

ΔY LCP: Lateral fringe shift of LCP light smoothed using Savitzky-Golay filter in µm

ΔY RCP: Lateral fringe shift of RCP light in µm

ΔY RCP: Lateral fringe shift of RCP light smoothed using Savitzky-Golay filter in µm

ΔY RCP-LCP: The dichroic signal fringe shift values in terms of the dispersive part of the refractive index in arbitrary units

ΔY RCP-LCP: The dichroic signal fringe shift values smoothed using Savitzky-Golay filter in terms of the dispersive part of the refractive index in arbitrary units

ΔY RCP-LCP: The dichroic signal fringe shift in terms of the electron scattering factors in arbitrary units.

B_z: The applied external magnetic field applied in the out-of-plane direction with respect to the sample in Gauss.

File: fig2_err.csv

Description: The error values of the fringe shift values obtained from the registration algorithm for RCP and LCP light.

Variables:

LCP error: Error values for the fringe shifts with LCP light.

RCP error: Error values for the fringe shifts with RCP light.

File: fig3_data.csv

Description: The beta values (absorptive part of the refractive index) are obtained from the fitting algorithm. These beta values are plotted as a function of the beam line energy to show the L2 and L3 absorptive peaks. The inset shows complementary diode current data normalized to absorption.

Variables:

β(RCP): The imaginary part of the refractive index for RCP light

β(LCP): The imaginary part of the refractive index for LCP light

β(RCP-LCP): The dichroic signal of absorption in terms of imaginary part of the refractive index 

Absorption (RCP): The diode current normalized to the absorption for RCP light

Absorption (LCP): The diode current normalized to the absorption for LCP light

Beamline energy (main panel): The beam line energy scale for the main panel 705 to 730 eV

Beamline energy (inset panel): The beam line energy scale for the inset panel 695 to 735 eV

File: fig4_data.csv

Description: The inset displays the results of the registration algorithm applied to the beamline energy scans. The main panel presents the first derivative of this data with respect to the incident energy, effectively resolving the L3 absorption edge peak.

Variables:

∂ΔY/∂E (LCP): The obtained fringe shift values are differentiated with respect to beamline energy to obtain the rate of fringe shift for LCP light in µm/eV

∂ΔY/∂E (RCP): The obtained fringe shift values are differentiated with respect to beamline energy to obtain the rate of fringe shift for RCP light in µm/eV

∂ΔY/∂E (RCP-LCP): The obtained dichroic fringe shift values are differentiated with respect to beamline energy to obtain the rate of fringe shift for the dichroic signal n µm/eV

ΔY LCP: Lateral fringe shift of LCP light in µm

ΔY RCP: Lateral fringe shift of RCP light in µm

Beamline Energy: The beam line energy scale for both panels from 700 to 725 eV