Synthesis and magnetic interaction on concentrated Fe3O4 nanoparticles obtained by the co-precipitation and hydrothermal chemical methods
| Autor: | Cristiano T. Meneses, R.J.S. Lima, J.R. Jesus, J.M.A. Almeida, J.G.S. Duque, K.O. Moura, A.C.B. Jesus |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Coprecipitation Process Chemistry and Technology Analytical chemistry 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Hydrothermal circulation Surfaces Coatings and Films Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Magnetization Transmission electron microscopy 0103 physical sciences Materials Chemistry Ceramics and Composites Particle size 0210 nano-technology Anisotropy Scherrer equation Superparamagnetism |
| Zdroj: | Ceramics International. 46:11149-11153 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2020.01.135 |
| Popis: | In this work, a comparative study of the synthesis and magnetic properties of Fe3O4 nanoparticles obtained by the co-precipitation and hydrothermal methods with the adding of the sucrose as a chelating agent is reported. The analysis of X-ray diffraction (XRD) patterns and transmission electron microscopy (TEM) show that particles are spherical-like with an average particle size ranging of 3 ≤ d ≤ 10 nm. Magnetization measurements as a function of an applied magnetic filed and temperature are consistent with a superparamagnetic behavior with small T B values. The analysis of the M v s H loops measured at T = 2 K and Zero-Field-Cooled and Field-Cooled ( Z F C − F C ) curves allows us to estimate the average diameter of Fe3O4 nanoparticles. These results are in good agreement with those obtained through XRD data (by using Scherrer equation and Williamson-Hall plot) and slightly smaller than those estimated using TEM images. Finally, Z F C − F C data are also used to evaluate the effective anisotropy constants, which are similar to those values found in literature considering the average sizes values estimated by different techniques. |
| Databáze: | OpenAIRE |
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