Structural, Morphological, Raman, and Mössbauer Studies on (La{sub 0.8}Ca{sub 0.2}){sub 1−x}Bi{sub x}FeO{sub 3} (x = 0.0, 0.1, and 0.2) Compounds

Journal Article · Sat Jun 15 04:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4850-1· OSTI ID:22921247

Issaoui, H.; Benali, A.; Dhahri, E. ^[1]; Santos, R. F. ^[2]; Kuş, N. ^[3]; Nogueira, B. A.; Fausto, R. ^[4]; Costa, B. F. O. ^[5]

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1. Université de Sfax, Laboratoire de Physique Appliquée, Faculté des Sciences (Tunisia)
2. University of Porto, CEMUC, Department of Metallurgical and Materials Engineering (Portugal)
3. Eskişehir Technical University, Physics Department (Turkey)
4. University of Coimbra, CQC, Department of Chemistry (Portugal)
5. University of Coimbra, CFisUC, Physics Department (Portugal)

(La{sub 0.8}Ca{sub 0.2}){sub 1−x}Bi{sub x}FeO{sub 3} (x = 0.0, 0.1, and 0.2) compounds were prepared by the sol-gel method, using the citric acid route. Structural and microstructural characteristics of the samples were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy. Mössbauer spectroscopy was also used for magnetic characterization and structural confirmation of X-ray data. Refinement of XRD patterns indicated that the compounds crystallize in an orthorhombic structure, Pnma space group. The SEM measurements showed that the morphology of the samples is characterized by the existence of large agglomerates, while TEM confirmed the fine particle size. Raman spectra revealed that, when increasing temperature, the level of oxygen species adsorbed at the surface of the particles increases progressively. Room temperature Mössbauer spectroscopy data revealed the existence of two octahedral magnetic sites in the structure of the compounds, which is compatible with XRD data, and a small percentage of a paramagnetic phase in the samples, which increases with Bi-content.

• OSTI ID: 22921247
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 6 Vol. 32; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH ADDITIONS
CALCIUM COMPOUNDS
CRYSTAL STRUCTURE
FERRITES
FINE PARTICLES
LANTHANUM COMPOUNDS
MICROSTRUCTURE
MOESSBAUER SPECTROMETERS
ORTHORHOMBIC LATTICES
PARAMAGNETISM
PEROVSKITE
RAMAN SPECTRA
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
SOL-GEL PROCESS
SPACE GROUPS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION