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Evaluation of structural, optical, and magnetic properties of Gd doped MnFe2O4 nanoparticles
Evaluation of structural, optical, and magnetic properties of Gd doped MnFe2O4 nanoparticles
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Date
2023
Authors
Luu Huu Nguyen
Le The Tam
Nguyen Hoai Nam
Do Khanh Tung
Nguyen Xuan Truong
Dinh Van Tuan
Nguyen Van Quynh
Nguyen Le Minh Tri
Pham Thanh Phong
Pham Hong Nam
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Abstract
"In this study, the MnFe2O4 doped Gd (MnGdxFe2-xO4 with x = 0, 0.125, 0.25, and 0.5) magnetic nanoparticles
were successfully synthesized and revealed the significant effect of Gd content on structural, optical, and magnetic
properties. The replacement of Fe3+ ions by ion Gd3+ ions changed the crystallite size from 8.2 nm (x = 0)
to 13.5 nm (x = 0.5). The band gap of Gd-doped MnFe2O4 increased with an increase of the x value. The
magnetic curves showed that saturation magnetization (MS) and magnetic anisotropy (K) decreased simultaneously
with the concentration of Gd3+ ions. The MS value reduced from 54.0 emu/g (MnFe2O4) to 35.4 emu/g
(MnGd0.5Fe1.5O4). The K value dropped from 50.4 kJ/m3 (MnGd0.125Fe1.875O4) to 12.3 kJ/m3 (MnGd0.5Fe1.5O4).
The substantial reliance of magnetic anisotropy on the doping concentration, namely this large change in K with
a little change in size (8.2 nm–13.5 nm), demonstrated that doping is a suitable method for modifying the values
of magnetic anisotropy of materials"
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Keywords
"Gd doped,
MnFe2O4,
Magnetic properties,
Optical properties"