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Sol-Gel Synthesis, Structure, Morphology and Magnetic Properties of $Ni_{0.6}Mn_{0.4}Fe_{2}O_{4}$ Nanoparticles Embedded in $SiO_{2}$ Matrix
| Content Provider | MDPI |
|---|---|
| Author | Dippong, Thomas Levei, Erika Andrea Deac, Iosif Grigore Petean, Ioan Borodi, Gheorghe Cadar, Oana |
| Copyright Year | 2021 |
| Description | The structure, morphology and magnetic properties of $(Ni_{0.6}Mn_{0.4}Fe_{2}O_{4})_{α}(SiO_{2})_{100−α}$ (α = 0–100%) nanocomposites (NCs) produced by sol-gel synthesis were investigated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), atomic force microscopy (AFM) and vibrating sample magnetometry (VSM). At low calcination temperatures (300 °C), poorly crystallized $Ni_{0.6}Mn_{0.4}Fe_{2}O_{4}$, while at high calcination temperatures, well-crystallized $Ni_{0.6}Mn_{0.4}Fe_{2}O_{4}$ was obtained along with $α-Fe_{2}O_{3}$, quartz, cristobalite or iron silicate secondary phase, depending on the $Ni_{0.6}Mn_{0.4}Fe_{2}O_{4}$ content in the NCs. The average crystallite size increases from 2.6 to 74.5 nm with the increase of calcination temperature and ferrite content embedded in the $SiO_{2}$ matrix. The saturation magnetization (Ms) enhances from 2.5 to 80.5 emu/g, the remanent magnetization $(M_{R}$) from 0.68 to 12.6 emu/g and the coercive field $(H_{C}$) from 126 to 260 Oe with increasing of $Ni_{0.6}Mn_{0.4}Fe_{2}O_{4}$ content in the NCs. The $SiO_{2}$ matrix has a diamagnetic behavior with a minor ferromagnetic fraction, $Ni_{0.6}Mn_{0.4}Fe_{2}O_{4}$ embedded in $SiO_{2}$ matrix displays superparamagnetic behavior, while unembedded $Ni_{0.6}Mn_{0.4}Fe_{2}O_{4}$ has a high-quality ferromagnetic behavior. |
| Starting Page | 3455 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano11123455 |
| Journal | Nanomaterials |
| Issue Number | 12 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-12-20 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Condensed Matter Physics Zinc-manganese Ferrite Sol-gel Nanocomposite Magnetic Properties |
| Content Type | Text |
| Resource Type | Article |
