Journal article Open Access
Interrelation among superstructural ordering, oxygen nonstoichiometry, and lattice strain of double perovskite Sr2FeMoO6–δ materials
Nikolay Kalanda;
Dmitry Karpinsky;
Ivan Bobrikov;
Marta Yarmolich;
Victor Kuts;
Lin Huang;
Chanyong Hwang;
Dong-Hyun Kim
Double perovskite ceramics Sr2FeMoO6–δ having different amount of antisite disordering and oxygen content are prepared by the solid-phase reaction method using SrFeO2.52(3) and SrMoO4 initial reagents. X-ray and neutron diffraction techniques are used to estimate a modification in the structural parameters as a function of oxygen content and B–site cationic ordering. Reduction of oxygen content leads to an increase in the unit cell volume, which is mainly associated with an elongation of c –parameter of the tetragonal unit cell and relative expansion of the chemical bonds between Mo/Fe ions and apical oxygen ions. Superstructural ordering observed for the compounds causes a decrease in the unit cell volume, which is accompanied by a reduction in the length of the Mo/Fe – O bonds, located in the basal plane of oxygen octahedra. This modification of the unit cell parameters notably affects a character of the exchange interactions formed between B–site ions thus allowing to control magnetic and transport properties of Sr2FeMoO6–δ ceramics. It is found that comprehensive approach allows a consistent understanding of much debated structural/magnetic behaviors of double perovskite Sr2FeMoO6–δ systems, opening a venue for designing reliable devices based on the half-metallic double perovskite materials.
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Kalanda et al (AAM) - J Mater Sci 56, 11698–11710 (2021).pdf
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- Publication date:
- April 12, 2021
- DOI:
-
- Keyword(s):
- double perovskite strontium ferromolybdate oxygen nonstoichiometry Fe/Mo superstructural ordering neutron diffraction X–ray photoemission spectra
- Grants:
-
European Commission:
- SPINMULTIFILM - Physical principles of the creation of novel SPINtronic materials on the base of MULTIlayered metal-oxide FILMs for magnetic sensors and MRAM (778308)
- Related identifiers:
- New versions
- 10.1007/s10853-021-06072-0 (Journal article)
- License (for files):
- Creative Commons Attribution 4.0 International