Nikolay Kalanda
Dmitry Karpinsky
Ivan Bobrikov
Marta Yarmolich
Victor Kuts
Lin Huang
Chanyong Hwang
Dong-Hyun Kim
2021-04-12
<p>Double perovskite ceramics Sr<sub>2</sub>FeMoO<sub>6–δ </sub>having different amount of antisite disordering and oxygen content are prepared by the solid-phase reaction method using SrFeO<sub>2</sub><sub>.52(3) </sub>and SrMoO<sub>4</sub> 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 <strong><em>c</em></strong><em> –</em>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 Sr<sub>2</sub>FeMoO<sub>6–δ </sub>ceramics. It is found that comprehensive approach allows a consistent understanding of much debated structural/magnetic behaviors of double perovskite Sr<sub>2</sub>FeMoO<sub>6–δ </sub>systems, opening a venue for designing reliable devices based on the half-metallic double perovskite materials.</p>
https://doi.org/10.5281/zenodo.4701286
oai:zenodo.org:4701286
eng
Zenodo
https://doi.org/10.1007/s10853-021-06072-0
https://zenodo.org/communities/eu
https://doi.org/10.5281/zenodo.4701285
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
double perovskite
strontium ferromolybdate
oxygen nonstoichiometry
Fe/Mo superstructural ordering
neutron diffraction
X–ray photoemission spectra
Interrelation among superstructural ordering, oxygen nonstoichiometry, and lattice strain of double perovskite Sr2FeMoO6–δ materials
info:eu-repo/semantics/article