Characterization and magnetic study of new oleic acid-coated Gd-Sm-Er-doped Co-Nanoferrite CoFe1,6Er0,1Gd0,2Sm0,1O4


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Output type: Journal article

UM6P affiliated Publication?: Yes

Author list: Oulhakem, O.; Guetni, I; Elansary, M.; Mouhib, Y.; Belaiche, M.; Alaoui, K. Belrhiti

Publisher: SPRINGER HEIDELBERG

Publication year: 2021

Journal: APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING (0947-8396)

Journal acronym: APPL PHYS A-MATER

Volume number: 127

Issue number: 11

ISSN: 0947-8396

eISSN: 1432-0630

Languages: English (EN-GB)


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Abstract

The fabrication of superparamagnetic nanoparticles coated in one step is a challenge for biomedical applications. In this paper, oleic acid-coated CoFe1.6Er0.1Gd0.2Sm0.1O4 nanoparticles were prepared by the co-precipitation method in one step for the first time. The cationic distribution among tetrahedral and octahedral sites of Co2+ and Fe3+ was determined by the Rietveld method and the inversion degree represented by the concentration of Co2+ in tetrahedral site was found to be 0.40. The morphology of the material has been estimated by TEM microscopy, and the average size of the particles was 15 nm. The interaction between oleic acid used in the synthesis procedure and spinel particle surface was studied by FT-IR spectroscopy and TGA measurement. Oleic acid was found to be covalently bonded to the surface by bridging bidentate interaction, the number of oleic acid molecules adsorbed on a particle was 5450 while the surface area occupied per oleic acid molecule was 0.5 nm(2). Magnetic characterization has been performed at three different temperatures 5, 80 and 300 K which revealed that the synthesized material has a superparamagnetic behaviour which makes it suitable for biomedical application.


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Last updated on 2021-30-11 at 23:21