<div class="csl-bib-body">
<div class="csl-entry">Lammer, J., Berger, C., Löffler, S., Knez, D., Bucher, E., Haberfehlner, G., Kothleitner, G., Hofer, F., Sitte, W., & Grogger, W. (2022, September 4). <i>Quantifying Ordering Phenomena at the Atomic Scale in Rare Earth OxideCeramics via EELS Elemental Mapping</i> [Conference Presentation]. 16th Multinational Congress on Microscopy, Brünn, Czechia. http://hdl.handle.net/20.500.12708/113035</div>
</div>
-
dc.identifier.uri
http://hdl.handle.net/20.500.12708/113035
-
dc.description.abstract
Oxide ceramics qualify for multiple applications for future energy technologies: small changes inthe concentration of the elements already lead to changes of the macroscopic properties such aselectronic and ionic conductivity and catalytic activity. Precise characterization techniques, e.g.EELS or EDX in STEM, help to uncover these secrets of the nanoworld. Our investigations on newoxide ceramics – promising materials as triple conducting oxides (proton-, oxygen ion- andelectron-conducting) – revealed interesting correlations visible within high-resolution EELSelemental maps: perovskite- and Ruddlesden-Popper phases containing rare earth elementsexhibit variations of their element distributions within equivalent crystal sites. This behaviour isvividly observable in lanthanum barium ferrate, a second order Ruddlesden-Popper phase whereboth La and Ba occupy the A-sites within the crystal. Our experiments show that La favours sitesin the rock salt layer, whereas Ba prefers the perovskite block. Moreover, the Ba/La distributionvaries from atomic column to atomic column within both rock salt and perovskite layers.Unfortunately, acquiring elemental maps at atomic scale is always prone to channelling effects,which lead to additional intensities stemming from neighbouring atomic columns – a circumstancewhich renders a straightforward, reliable quantification impossible. We address this issue by usinginelastic multislice calculations based on Slater-type orbitals in order to overcome the problem withunknown neighbouring off-axis intensities. After subtracting the additional off-axis intensity wesuccessfully performed a column-by-column quantification: through taking advantage of the largechanges in the elemental distribution from column to column we introduced a quantificationtechnique which substitutes inelastic scattering cross sections during the quantification step byparameters obtained from the actual experiment [1]. We revealed that (in terms of crystalstructure) equivalent atomic columns within either the rock salt layer or the perovskite layer do notexhibit distinct La/Ba ratios but a broad variation in concentration.
en
dc.language.iso
en
-
dc.subject
EELS
en
dc.title
Quantifying Ordering Phenomena at the Atomic Scale in Rare Earth OxideCeramics via EELS Elemental Mapping
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.contributor.affiliation
Graz University of Technology, Austria
-
dc.contributor.affiliation
University of Passau, Germany
-
dc.contributor.affiliation
Graz University of Technology, Austria
-
dc.type.category
Conference Presentation
-
tuw.researchinfrastructure
Analytical Instrumentation Center
-
tuw.researchTopic.id
Q3
-
tuw.researchTopic.id
M2
-
tuw.researchTopic.name
Quantum Modeling and Simulation
-
tuw.researchTopic.name
Materials Characterization
-
tuw.researchTopic.value
30
-
tuw.researchTopic.value
70
-
tuw.publication.orgunit
E057-02 - Fachbereich Universitäre Serviceeinrichtung für Transmissions- Elektronenmikroskopie
-
tuw.author.orcid
0000-0002-0697-5920
-
tuw.author.orcid
0000-0003-2754-9530
-
tuw.author.orcid
0000-0003-0080-2495
-
tuw.author.orcid
0000-0003-0755-958X
-
tuw.author.orcid
0000-0003-4136-9384
-
tuw.author.orcid
0000-0002-2116-7761
-
tuw.author.orcid
0000-0001-9986-2193
-
tuw.author.orcid
0000-0003-4905-6825
-
tuw.author.orcid
0000-0003-1762-3485
-
tuw.event.name
16th Multinational Congress on Microscopy
en
tuw.event.startdate
04-09-2022
-
tuw.event.enddate
09-09-2022
-
tuw.event.online
On Site
-
tuw.event.type
Event for scientific audience
-
tuw.event.place
Brünn
-
tuw.event.country
CZ
-
tuw.event.presenter
Lammer, Judith
-
tuw.event.track
Multi Track
-
wb.sciencebranch
Physik, Astronomie
-
wb.sciencebranch.oefos
1030
-
wb.sciencebranch.value
100
-
item.openairetype
conference paper not in proceedings
-
item.languageiso639-1
en
-
item.cerifentitytype
Publications
-
item.fulltext
no Fulltext
-
item.grantfulltext
none
-
item.openairecristype
http://purl.org/coar/resource_type/c_18cp
-
crisitem.author.dept
Graz University of Technology
-
crisitem.author.dept
University of Passau
-
crisitem.author.dept
E057-02 - Fachbereich Universitäre Serviceeinrichtung für Transmissions- Elektronenmikroskopie
-
crisitem.author.dept
Graz University of Technology
-
crisitem.author.dept
Montanuniversität Leoben
-
crisitem.author.dept
E362 - Institut für Festkörperelektronik
-
crisitem.author.dept
Graz University of Technology
-
crisitem.author.dept
Montanuniversität Leoben
-
crisitem.author.dept
E404 - CSLEARN
-
crisitem.author.orcid
0000-0003-2754-9530
-
crisitem.author.orcid
0000-0003-0080-2495
-
crisitem.author.orcid
0000-0002-2116-7761
-
crisitem.author.orcid
0000-0003-4905-6825
-
crisitem.author.parentorg
E057 - Facilities und Zentren
-
crisitem.author.parentorg
E350 - Fakultät für Elektrotechnik und Informationstechnik
