Structural, optical and magnetic properties of Sr and Ni co-doped YFeO3 nanoparticles prepared by simple co-precipitation method.

Autor: Pham, Duyen H. T., Nguyen, Linh T. Tr., Mittova, V. O., Chau, Diem H., Mittova, I. Ya., Nguyen, Tien A., Bui, Vuong X.
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Zdroj: Journal of Materials Science: Materials in Electronics; Jun2022, Vol. 33 Issue 18, p14356-14367, 12p
Abstrakt: YFeO3+δ, Y0.8Sr0.2FeO3+δ, YFe0.8Ni0.2O3+δ, and Y0.8Sr0.2Fe0.8Ni0.2O3+δ nanoparticles have been successfully synthesized by a simple co-precipitation technique. Results obtained using thermogravimetry and differential scanning calorimetry, powder X-ray diffraction, transmission electron microscopy indicate that YFeO3, Sr-doped YFeO3, Ni-doped YFeO3, and Sr and Ni co-doped YFeO3 nanoparticles with orthorhombic structure were fabricated at 800 °C for 1 h. The obtained materials have the crystallite sizes below 30 nm and particle sizes below 40 nm. Sr and/or Ni doping led to the distortion of the YFeO3 crystal structure and thus altered the magnetic properties of the corresponding materials. The Sr-doped YFeO3, Sr and Ni co-doped YFeO3, and especially Ni-doped YFeO3 samples have significantly higher absorbance in the visible light region (~ 400–800 nm) and lower band gap than those of pure YFeO3 sample. Magnetic hysteresis loop analyses illustrate that ferromagnetic behavior of the YFeO3 nanopowders can be strongly enhanced with the addition of Sr and/or Ni. The coercivity and remanent magnetization of Sr and Ni co-doped YFeO3+δ are, respectively, around 80 and 104 times higher than those of the pure YFeO3+δ sample. The excellent optical and magnetic properties of Sr and Ni co-doped YFeO3+δ nanomaterials suggest great potential for applications related to optics and magnetism. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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