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Site‐selective substitution and resulting magnetism in arc‐melted perovskite ATiO₃₋δ (A = Ca, Sr, Ba)

Yoon, Songhak ; Xie, Wenjie ; Xiao, Xingxing ; Checchia, Stefano ; Coduri, Mauro ; Schuetzenduebe, Peter ; Widenmeyer, Marc ; Ebbinghaus, Stefan G. ; Balke, Benjamin ; Weidenkaff, Anke ; Schütz, Gisela ; Son, Kwanghyo (2023)
Site‐selective substitution and resulting magnetism in arc‐melted perovskite ATiO₃₋δ (A = Ca, Sr, Ba).
In: Journal of the American Ceramic Society, 2023, 106 (11)
doi: 10.26083/tuprints-00024675
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Site‐selective substitution and resulting magnetism in arc‐melted perovskite ATiO₃₋δ (A = Ca, Sr, Ba)
Language: English
Date: 7 November 2023
Place of Publication: Darmstadt
Year of primary publication: 2023
Place of primary publication: Oxford
Publisher: Wiley-Blackwell
Journal or Publication Title: Journal of the American Ceramic Society
Volume of the journal: 106
Issue Number: 11
DOI: 10.26083/tuprints-00024675
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

Magnetic properties in perovskite titanates ATiO₃₋δ (A = Ca, Sr, Ba) were investigated before and after arc melting. Crystal structure analysis was conducted by powder synchrotron X‐ray diffraction with Rietveld refinements. Quantitative chemical element analysis was carried out by X‐ray photoelectron spectroscopy. Magnetic measurements were conducted by vibrating sample magnetometer and X‐ray magnetic circular dichroism (XMCD). The magnetic properties are found to be affected by impurities of 3d elements such as Fe, Co, and Ni. Depending on the composition and crystal structure, the occupation of the magnetic ions in perovskite titanates is selectively varied, which is interpreted to be the origin of the different magnetic behaviors in arc‐melted perovskite titanates ATiO₃₋δ (A = Ca, Sr, Ba). In addition, both formation of oxygen vacancies and the reduction of Ti⁴⁺ to Ti³⁺ during arc‐melting also play a role as proven by XMCD. Nevertheless, preferential site occupation of magnetic impurities is dominant in the magnetic properties of arc‐melted perovskite ATiO₃₋δ (A = Ca, Sr, Ba).

Uncontrolled Keywords: arc‐melting, magnetism, perovskite oxide, synchrotron X‐ray diffraction, X‐ray magnetic circular dichroism
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-246759
Additional Information:

The authors are grateful to European Synchrotron Radiation Facility (ESRF), the synchrotron light source KARA and the Karlsruhe Nano Micro Facility (KNMF) for the provision of beamtimes. The authors are indebted to Mr. Samir Hammoud at the Max Planck Institute for Intelligent Systems for the chemical analysis (ICP-OES, hot gas extraction). Open Access funding enabled and organized by Project DEAL.

Classification DDC: 500 Science and mathematics > 530 Physics
500 Science and mathematics > 540 Chemistry
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Materials and Resources
Date Deposited: 07 Nov 2023 12:37
Last Modified: 19 Jul 2024 10:46
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/24675
PPN: 513364382
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