Synthesis and magnetic interaction on concentrated Fe3O4 nanoparticles obtained by the co-precipitation and hydrothermal chemical methods. Issue 8 (1st June 2020)

• Record Type: Journal Article
• Authors: Jesus, A.C.B.; Jesus, J.R.; Lima, R.J.S.; Moura, K.O.; Almeida, J.M.A.; Duque, J.G.S.; Meneses, C.T.
• Is Part Of: Ceramics international. Volume 46:Issue 8(2020)Part A
• Page Start: 11149
• Page End: 11153
• Publication Date: 2020-06-01
• Subjects: Fe3O4 nanoparticles -- Particle sizes -- Magnetic cluster -- Co-precipitation -- Hydrothermal -- Effective anisotropy; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.01.135
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this work, a comparative study of the synthesis and magnetic properties of Fe3 O4 nanoparticles obtained by the co-precipitation and hydrothermal methods with the adding of the sucrose as a chelating agent is reported. The analysis of 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 field 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 Fe3 O4 nanoparticles. These results are in good agreement with those obtained through X-ray diffraction (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.