The structural, DC resistivity and magnetic properties of Zr and Co co-substituted Ni0.5Zn0.5Fe2O4

Abstract

The Zr and Co co-substituted Ni 0.5 Zn 0.5 Fe 2 O 4 have been synthesized by sol-gel auto combustion method. The XRD patterns provide single phase cubic spinel with ( ( )) space group and extra peaks found in XRD patterns from x = 0.24 to x = 0.4. The experimental lattice parameter is increased from 8.3995Å to 8.4129 Å and the theoretical lattice parameter is increased from 8.3948Å to 8.4130Å with increasing dopant concentration. The substitute ions in place of ferric ions cause the significant changes in all structural parameters. The D.C resistivity is increased from 126597 Ω-cm to 684229 Ω-cm and the drift mobility is decreased from 4.9×10 −36 cm 2 /V-s to 1.88× 10 −36 cm 2 /V-s with increasing dopant concentration. The activation energy is decreased from 0.2108 eV to 0.0905 eV with increasing doping concentration. The saturation magnetization is decreased from 71.1559 emu/gm to 28.2405 emu/gm and the net magnetic moment is decreased from 6.3556 Bhor magnetons to 2.5523 Bhor magnetons with increasing dopant concentration. The Y-K angles are increased from 20.0723̊ to 59.4274̊ with increasing dopant concentration. The anisotropy constant has increased from 100 to 351 with increasing dopant concentration. The permeability is decreased from 117 to 19.4524 with increasing dopant concentration.

Investigation on structure, thermodynamic and multifunctional properties of Ni–Zn–Co ferrite for Gd3+ substitution

“…Moreover, Gd 3+ substitution is responsible for creating a large anisotropic constant for which μ ′ decreases. 62 Apart from this, the thermo-magnetization between 300 K to 850 K under the application of a constant field of 1 kOe confirms the ferromagnetic (FM) to paramagnetic (PM) transition in all studied samples as illustrated in Fig. 6(b).…”

“…23–26 Fe 3+ may exist in two oxidation states (Fe 3+ /Fe 2+ ) in both A and B sites, 27 which results in the electrical conduction in Ni–Zn ferrite. From an earlier report 28 it is observed that the resistivity of Ni–Zn ferrite increases due to the addition of Co 2+ . Furthermore, Parvatheswara et al reported that Co 2+ substitution for Zn 2+ enhances the saturation magnetization, while initial permeability decreases.…”

Controllable synthesis of La3+ dopedZn0.5Co0.25Cu0.25Fe2−xLRehman1, Morley2, Amin3 et al. 2020Ceramics International59140View full textAdd to dashboardCite

“…It can be seen that the Curie temperature ( ) has a maximum of 370 K at x = 0.0375. The drift mobility (µ ) of the samples were determined [63] and the value at RT is 0.3682±0.0018×10 -30 cm 2 /Vs, 0.4118±0.0021×10 -30 cm 2 /Vs, 23.8342 ± 0.1192×10 -30 cm 2 /Vs, 29.9584±0.1498×10 -30 cm 2 /Vs and 0.5100±0.0026×10 -30 cm 2 /Vs respectively. It can be seen at RT, the drift mobility (µ ) has a maximum value, and DC resistivity has a minimum value at x=0.0375.…”

Structure Design of Soft Magnetic Materials Using Electron‐Beam‐Based Additive Manufacturing

“…using PBF‐L. [ 9 ] Even now, at low frequencies between 50 Hz and 100 Hz, the modified specimens possess a stable maximum magnetic flux density of ≈0.902 T which already outperforms some commercial soft magnetic materials;, e.g., soft ferrites show the saturation magnetic flux density values in the range of 0.103–0.546 T; [ 19,33–36 ] the saturation magnetic flux density values of Fe–Ni‐based molypermalloy are reported to be ≈0.7 T; [ 19,37 ] and the saturation magnetic flux density values of Fe–Ni‐based supermalloy are commonly in the range of 0.66–0.82 T. [ 19,37,38 ]…”