Abstract
The structural state and crystal structure of Lu(1−x)ScxFeO3 (0 ≤ x ≤ 1) compounds prepared by a chemical route based on a modified sol–gel method were investigated using X-ray diffraction, Raman spectroscopy, as well as scanning electron microscopy. It was observed that chemical doping with Sc ions led to a structural phase transition from the orthorhombic structure to the hexagonal structure via a wide two-phase concentration region of 0.1 < x < 0.45. An increase in scandium content above 80 mole% led to the stabilization of the non-perovskite bixbyite phase specific for the compound ScFeO3. The concentration stability of the different structural phases, as well as grain morphology, were studied depending on the chemical composition and synthesis conditions. Based on the data obtained for the analyzed samples, a composition-dependent phase diagram was constructed.
Highlights
The crystal structure and properties of compounds with perovskite structure [1,2,3,4] can be drastically modified by a chemical substitution in Aand/or B-perovskite sublattices
Taking the mentioned arguments into account, in this paper, we provide a new route to prepare Sc-doped LuFeO3 polycrystalline compounds using an aqueous sol–gel synthesis procedure and provide clarification of the concentration ranges of the different structural phases present in the system and analyzed by means of SEM, energy-dispersive X-ray (EDX)/EDS, X-ray diffraction, and Raman spectroscopy
Similar case was observed for the compound with 75% of Sc ions, where the amount of the bixbyite phase increased from 0% at 1100 ◦ C to 20% after calcination at 1300 ◦ C and to 80% after sintering at 1500 ◦ C
Summary
The crystal structure and properties of compounds with perovskite structure (nominal chemical formula ABO3 ) [1,2,3,4] can be drastically modified by a chemical substitution in Aand/or B-perovskite sublattices. The possibility to control physical properties via chemical doping is important in regard to the formation of both electrical and magnetic orderings in these compounds, which are commonly referred to as multiferroics [8,9]. These conditions are often contradictive, since magnetic ordering usually requires partially filled d orbitals, whereas electrical ordering requires empty d orbitals of the ions occupying the. The formation of efficient multiferroic compounds allows controlling their electric properties by a magnetic field and vice versa, making these compounds potentially useful for various practical applications [8,11,12,13]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
