Investigation of structural and magnetic properties of Fe3O4 and ZrO2-coated Fe3O4 Core/Shell magnetic nanoparticles (MNPs)


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Candemir M., Akyol M., Ekicibil A., Güldeste A.

6th International Conference on Materials Science and Nanotechnology For Next Generation (MSNG-2019) October 16-18, 2019, Niğde, TURKEY, Niğde, Turkey, 16 - 18 October 2019, pp.1

  • Publication Type: Conference Paper / Summary Text
  • City: Niğde
  • Country: Turkey
  • Page Numbers: pp.1
  • Erciyes University Affiliated: Yes

Abstract

Magnetite Fe3O4 magnetic nanoparticles (MNPs) having ferrimagnetic (FIM) characteristic are one of the important materials between FexOy groups due to having a high saturation magnetization (Ms) and nearly full spin polarization at 300 K. Therefore, it has attracted attention to use in giant magneto-electronic and spin-valve devices [1]. In this study, we synthesized both Fe3O4 MNPs and ZrO2-Coated Fe3O4 core/shell MNPs via polyol reduction process. The structural properties were studied by X-Ray Diffraction (XRD) method. The average crystallite size of Fe3O4/ZrO2 core/shell MNPs was calculated as ~6.3 nm. The morphological and elemental properties were characterized by the Scanning Electron Microscopy (SEM) and the Energy Dispersive Spectroscopy (EDS) analysis. The average particle size was determined as ~3.4 nm from SEM images. The temperature dependence magnetization (M-T) under Zero Field Cooled (ZFC) and Field (FC) conditions and the magnetic field dependence magnetization (M-H) measurements (under 10 and 300 K) were carried out by the Physical Property Measurement System (PPMS) with Vibrating Sample Module (VSM) analysis. From the M-T measurements, it was observed that ferromagnetic to paramagnetic phase transition and the blocking temperature (TB) were determined as 50 and 25 K, respectively. The Ms was determined as ~48.92 and 47.29 emu/g at 20 and 100 K, respectively. The effect of ZrO2 coating on Fe3O4 will be discussed in detail in the presentation.   

 

 

[1] G. F. Goya, T. S. Berquo and F. C. Fonseca, Static and Dynamic Magnetic Properties of Spherical Magnetite Nanoparticles, Journal of Applied Physics, 94, 5, (2003).