Study of the Structural, Magnetic and Transport properties of La³⁺ Doped Cu-Zn Ferrite

Abstract

Crystalline La doped Cu-Zn ferrite with compositions Cu0.15Zn0.85LaxFe2-xO4 [ x = 0.00, 0.02, 0.04, 0.06 and 0.08] were synthesized by using conventional solid state reaction method technique. X-ray diffraction pattern (XRD),
 Crystalline La doped Cu-Zn ferrite with compositions Cu0.15Zn0.85LaxFe2-xO4 [x = 0.00, 0.02, 0.04, 0.06 and 0.08] were synthesized by using conventional solid state reaction method technique. X-ray diffraction pattern (XRD), scanning electron micrographs (SEM), hysteresis loop (M-H) curves and frequency dependent resistivity were employed to inspect the effect of La3+ doping on the structure, microstructure, magnetic and transport properties of the specimens. All the specimens exhibited fcc type cubic spinel structure where the particle size were within 500-1600 nm range. Magnetically ferromagnetic phenomenon was found for all the samples where the effect of La3+ doping consequence on the variation of various parameters like saturation magnetization (Ms), coercivity (Hc) and remanent magnetization (Mr). The resistivity tuned by frequency for all the samples presented the decreasing phenomenon with the increase of applied frequency.

Effect of Y3+ Substitution on Structural and Magnetic Properties of Ni0.25 Zn0.75YxFe2-xO4

“…In our investigation, according to Fig. 5 ) element all the magnetic parameters start to decrease 17 . These observations suggest that the magnetization in Y-doped composites is hard to realize since the spontaneous magnetization of the specimens comes from unbalanced antiparallel spin and that give rise to net spins other than those induced from the structural distortion 22 .…”