Magnetic Attributes of NiFe2O4 Nanoparticles: Influence of Dysprosium Ions (Dy3+) Substitution

Abstract

This paper reports the influence of dysprosium ion (Dy3+) substitution on the structural and magnetic properties of NiDyxFe2−xO4 (0.0 ≤ x ≤ 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 Mössbauer 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–Arrhenius (N–A), Vogel–Fulcher (V–F), 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.

Influence of Zn+2 Doping on Ni-Based Nanoferrites; (Ni1−x ZnxFe2O4)

“…Different methods have been employed to synthesize nanoferrites, such as sol–gel route [12,38,39], co-precipitation [40], hydrothermal technique, ball-mill [41], or micro-emulsion method [42]. Each mode has its impact on the particle size, morphology, catalytic activity, dielectric, or magnetic properties [43].…”

Controllable synthesis of La3+ doped Zn0.5Co0.25Cu0.25Fe2−xLRehman1, Morley2, Amin3 et al. 2020Ceramics International45140View full textAdd to dashboardCite

“…Nowadays, these types of magnetic materials are used in different applications, i.e., in high-frequency applications [1], as gas sensors for H2S [2], for LPG sensing [3], biomedical, and biotechnology [4], optoelectronics applications [5], and removing pollutants as an advanced adsorbent magnetic material from wastewater [6]. Spinel structure oxides have fundamental and practical significance for catalyzes, such as two-phase structure nanowires used as catalytic para-nitroaniline (PNA) to para-phenyl diamine (PPD) reduction reaction [7,8], lithium-ion batteries [9], magnetic and highfrequency applications [10][11][12][13].…”

Effect of Terbium Ion Substitution in Inverse Spinel Nickel Ferrite: Structural and Magnetic Study

“…Aside from replacing Fe 3+ ions with magnetic and non-magnetic ions, researchers have studied the substitution of rare-earth elements [16,19,20]. Larger ionic radii of the rare-earth ions compared to Fe 3+ were observed to bring lattice expansion in ferrites, which can alter the superexchange interaction of Fe 3+ -O 2− -Fe 3+ [21].…”