`exspy.data`#

`EDS_SEM_TM002`()	Load an EDS-SEM spectrum of a EDS-TM002 standard supplied by the Bundesanstalt für Materialforschung und -prüfung (BAM).
`EDS_TEM_FePt_nanoparticles`()	Load an EDS-TEM spectrum of FePt bimetallic nanoparticles.
`EELS_low_loss`([add_noise, random_state, ...])	Get an artificial low loss electron energy loss spectrum.
`EELS_MnFe`([add_powerlaw, add_noise, ...])	Get an artificial core loss electron energy loss spectrum.
`eelsdb`([spectrum_type, title, author, ...])	Download spectra from the EELS database.

This module contains functions to load example or datasets from EELSDB.

exspy.data.EDS_SEM_TM002()#

Load an EDS-SEM spectrum of a EDS-TM002 standard supplied by the Bundesanstalt für Materialforschung und -prüfung (BAM). The sample consists of an approximately 6 µm thick layer containing the elements C, Al, Mn, Cu and Zr on a silicon substrate.

Notes

Sample: EDS-TM002 provided by BAM (www.webshop.bam.de)
SEM Microscope: Nvision40 Carl Zeiss
EDS Detector: X-max 80 from Oxford Instrument

exspy.data.EDS_TEM_FePt_nanoparticles()#

Load an EDS-TEM spectrum of FePt bimetallic nanoparticles.

Notes

TEM Microscope: Tecnai Osiris 200 kV D658 AnalyticalTwin
EDS Detector: Super-X 4 detectors Brucker

exspy.data.EELS_MnFe(add_powerlaw=True, add_noise=True, random_state=None, navigation_shape=(10,))#

Get an artificial core loss electron energy loss spectrum.

Similar to a Mn-L32 edge from a perovskite oxide.

Some random noise is also added to the spectrum, to simulate experimental noise.

Parameters:

add_powerlaw (bool) – If True, adds a powerlaw background to the spectrum. Default is False.
add_noise (bool) – If True, add noise to the signal. See note to seed the noise to generate reproducible noise.
random_state (None or int or RandomState instance, default None) – Random seed used to generate the data.
navigation_shape (tuple) – The shape of the navigation space. Must be of length 1.

Return type:

EELSSpectrum

Example

>>> import exspy
>>> s = exspy.data.EELS_Mn()
>>> s.plot()

With the powerlaw background

>>> s = exspy.data.EELS_Mn(add_powerlaw=True)
>>> s.plot()

See also

EELS_MnFe

exspy.data.eelsdb(spectrum_type=None, title=None, author=None, element=None, formula=None, edge=None, min_energy=None, max_energy=None, resolution=None, min_energy_compare='gt', max_energy_compare='lt', resolution_compare='lt', max_n=-1, monochromated=None, order=None, order_direction='ASC', verify_certificate=True, show_progressbar=None)#

Download spectra from the EELS database.

Parameters:

spectrum_type ({'coreloss', 'lowloss', 'zeroloss', 'xrayabs'}, optional)
title (string) – Search spectra titles for a text string.
author (string, optional) – Search authors for a text string.
element (string or list of strings, optional) – Filter for the presence of one or more element. Each string must correspond with a valid element symbol.
formula (string) – Chemical formula of the sample.
edge ({'K', 'L1', 'L2,3', 'M2,3', 'M4,5', 'N2,3', 'N4,5' 'O2,3', 'O4,5'}, optional) – Filter for spectra with a specific class of edge.
min_energy (float, optional) – Minimum and maximum energy in eV.
max_energy (float, optional) – Minimum and maximum energy in eV.
resolution (float, optional) – Energy resolution in eV.
resolution_compare ({"lt", "eq", "gt"}, optional, default "lt") – “lt” to search for all spectra with resolution less than resolution. “eq” for equal, “gt” for greater than.
min_energy_compare ({"lt", "eq", "gt"}, optional) – “lt” to search for all spectra with min/max energy less than min_energy`max_energy`. “eq” for equal, “gt” for greater than. Deafault values are “gt”/”lt” for min_energy`max_energy` respectively.
max_energy_compare ({"lt", "eq", "gt"}, optional) – “lt” to search for all spectra with min/max energy less than min_energy`max_energy`. “eq” for equal, “gt” for greater than. Deafault values are “gt”/”lt” for min_energy`max_energy` respectively.
monochromated (bool or None (default))
max_n (int, default -1) – Maximum number of spectra to return. -1 to return all.
order (string) –
Key to sort results by. Valid keys are:
- ”spectrumType”,
- ”spectrumMin”,
- ”spectrumMax”,
- ”stepSize”,
- ”spectrumFormula”,
- ”spectrumElement”,
- ”spectrumUpload”,
- ”source_purity”,
- ”spectrumEdges”,
- ”microscope”,
- ”guntype”,
- ”beamenergy”,
- ”resolution”,
- ”monochromated”,
- ”acquisition_mode”,
- ”convergence”,
- ”collection”,
- ”probesize”,
- ”beamcurrent”,
- ”integratetime”,
- ”readouts”,
- ”detector”,
- ”darkcurrent”,
- ”gainvariation”,
- ”calibration”,
- ”zeroloss_deconv”,
- ”thickness”,
- ”deconv_fourier_log”,
- ”deconv_fourier_ratio”,
- ”deconv_stephens_deconvolution”,
- ”deconv_richardson_lucy”,
- ”deconv_maximum_entropy”,
- ”deconv_other”,
- ”assoc_spectra”,
- ”ref_freetext”,
- ”ref_doi”,
- ”ref_url”,
- ”ref_authors”,
- ”ref_journal”,
- ”ref_volume”,
- ”ref_issue”,
- ”ref_page”,
- ”ref_year”,
- ”ref_title”,
- ”otherURLs”
order_direction ({"ASC", "DESC"}) – Sorting order direction.
verify_certificate (bool) – If True, verify the eelsdb website certificate and raise an error if it is invalid. If False, continue querying the database if the certificate is invalid. (This is a potential security risk.)
show_progressbar (None or bool) – If True, display a progress bar. If None, the default from the preferences settings is used.

Returns:

spectra – A list containing all the spectra matching the given criteria if any.

Return type:

list

exspy.data#

`exspy.data`#