Influence of Rare Earth Substitution on the Magnetic Properties of Spinel Ferrites

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Demir Korkmaz A.

2nd International Conference on Life and Engineering Sciences (ICOLES-2019), İstanbul, Turkey, 27 - 29 June 2019, pp.33

  • Publication Type: Conference Paper / Summary Text
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.33


Nano-size ferrites (NSF) are magnetic nanoparticles (MNPs) which have attracted great interest in basic and applied sciences as well as engineering in the last decades. NSF are widely used in various technological, environmental, and biomedical applications owing to their high surface area-to-volume ratio, high saturation magnetization, initial permeability, etc. Nickel-copper-zinc ferrites are important technological materials especially used in multi-layer chip inductors (MLCIs). Multi-layer chip inductors (MLCIs) are passive surface mounting devices (SMD) employed in the circuitry for the miniaturization of various devices in the electronics industry. The main uses of MLCIs include mobile phones, camcorders, notebook computers, etc. MLCIs are composed of alternating layers of silver electrodes and soft ferrites. Thus, it is important to develop magnetic characteristics in ferrites for requiring less ferrite layers and hence to obtain further miniaturized devices. The goal of our study is to investigate the effect of rare earth substitution of Ni-Cu-Zn ferrite nanoparticles. Ni-Cu-Zn NSFs substituted with rare earth metal ions Eu3+, Tb3+, and Dy3+ in varying concentrations were obtained by a sonochemical method. The crystal structure, morphology, confirmation of spinel structure, and magnetic properties of the nanoparticles were investigated by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), Fouriertransform infrared spectroscopy (FT-IR) and vibrating sample magnetometry (VSM), respectively. The XRD analysis confirmed the phase purity of the samples. Absorption bands which are the characteristic stretching vibrations of spinel ferrites were verified by the FT-IR analysis. The VSM results reveal that the rare earth substitution has a significant effect on the magnetic properties of the Ni-Cu-Zn NSFs. Key words: Magnetic nanoparticles, ferrites, rare earth.