%0 Journal Article
%T Magnetic Attributes of NiFe2O4 Nanoparticles: Influence of Dysprosium Ions (Dy3+) Substitution
%A A. Baykal
%A A. Manikandan
%A A.V. Trukhanov
%A H. G¨¹ng¨¹ne£¿
%A I. Ercan
%A Munirah Abdullah Almessiere
%A S. Ali
%A Y. Slimani
%J Archive of "Nanomaterials".
%D 2019
%R 10.3390/nano9060820
%X This paper reports the influence of dysprosium ion (Dy3+) substitution on the structural and magnetic properties of NiDyxFe2£¿xO4 (0.0 ¡Ü x ¡Ü 0.1) nanoparticles (NPs) prepared using a hydrothermal method. The structure and morphology of the as-synthesized NPs were characterized via X-ray diffraction (XRD), scanning and transmission electron microscope (SEM, and TEM) analyses. 57Fe M£¿ssbauer spectra were recorded to determine the Dy3+ content dependent variation in the line width, isomer shift, quadrupole splitting, and hyperfine magnetic fields. Furthermore, the magnetic properties of the prepared NPs were also investigated by zero-field cooled (ZFC) and field cooled (FC) magnetizations and AC susceptibility measurements. The MZFC (T) results showed a blocking temperature (TB). Below TB, the products behave as ferromagnetic (FM) and act superparamagnetic (SPM) above TB. The MFC (T) curves indicated the existence of super-spin glass (SSG) behavior below Ts (spin-glass freezing temperature). The AC susceptibility measurements confirmed the existence of the two transition temperatures (i.e., TB and Ts). Numerous models, e.g., Neel¨CArrhenius (N¨CA), Vogel¨CFulcher (V¨CF), and critical slowing down (CSD), were used to investigate the dynamics of the systems. It was found that the Dy substitution enhanced the magnetic interactions
%K NiFe2O4
%K spinel ferrites
%K structure
%K microstructure
%K magnetization
%K AC susceptibility
%U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6630553/