Structural, optical and magnetic properties of Y-doped CoFe2O4 nanoparticles prepared by a simple co-precipitation method

• Published in: Journal of materials science. Materials in electronics 2023-02, Vol.34 (5), Article 448
• Main Authors: Nguyen, Thi Kim Chung, Nguyen, Anh Tien
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Materials Science; Optical and Electronic Materials
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-023-09914-6

In this work, the effect of the annealing temperature and the content of doped yttrium ions on the structural, optical, and magnetic properties of the spinel nanoparticles CoFe 2− x Y x O 4 (0 ≤  x  ≤ 0.2) synthesized by the simple co-precipitation method without any organic gelation agent have been studied. The particle size measured from powder X-ray diffraction (PXRD) patterns, and transmission electron microscope (TEM) images confirm the nanostructural character in the range of 22–40 nm. The structural characteristics (crystal size ( D XRD , nm), crystalline intensity ( I , cts), and CoFe 2 O 4 crystalline phase content), magnetic properties (remanent magnetization ( M r , emu g −1 ), and saturation magnetization ( M s , emu g −1 )), as well as band gap energy values ( E g , eV), increased with increasing annealing temperature, while changes in coercivity values ( H c , Oe) followed the opposite trend. When the yttrium ion content in the CoFe 2 O 4 spinel crystal lattice increased, all the values of D XRD , H c , M r , M s , and E g decreased. CoFe 2− x Y x O 4 nanoparticles ( x  = 0, 0.05, 0.1, 0.15, and 0.2) have comparable H c and lower E g , but a much larger M r , and especially M s , than cobalt ferrite doped with different elements such as Y 3+ , Sm 3+ , Ce 4+ , or La 3+ . The excellent optical and magnetic properties of Y-doped CoFe 2 O 4 nanoparticles suggest great potential for applications related to optics and magnetism.