Ni0.4Cu0.2Zn0.4TbxFe2-xO4 nanospinel ferrites: Ultrasonic synthesis and physical properties
Loading...
Files
Date
2019
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Access Rights
info:eu-repo/semantics/openAccess
Abstract
The Fe3+ ions were replace with Tb3+ ions as highly paramagnetic rare earth element within the structure of Ni0.4Cu0.2Zn0.4Fe2O4 nano-spinel ferrites (NSFs). The structural, magnetic, spectroscopic and optic properties have been studied in details. All products have been synthesized via ultrasonic approach via Qsonica ultrasonic homogenizer, frequency: 20 kHz and power 70 W for 60 min. No annealing or calcination process was applied for any product. The microstructural analysis of products has been done via X-ray powder ciiffractometry (XRD) which presented the cubic spinel structure with nanosized distribution of all. The cubic morphology of all products were confirmed by both HR-TEM and FE-SEM. Optical band gap (E-g) values were assessed by applying %DR (percent diffuse reflectance) analysis and Kubelka-Munk theory. The Tauc schemes showed that E-g values are in a narrow range (1.87-1.98 eV). The quadrupole splitting, line width, hyperfine magnetic field, isomer shift values and cation distribution have been determined from Fe-57 Mossbauer analysis. The magnetic properties of various nanoparticles have been obtained from VSM (vibration sample magnetometer) measurements at 10 and 300 K (RT). The magnetic results revealed superparamagnetic and soft ferromagnetic traits at 10 and 300 K, respectively. M-s (saturation magnetization) and M-r (remanence) initially increase with increasing Tb(3+ )substituting level up to x = 0.06 then diminish for further x values. H-c (coercivity) shows an opposite variation tendency of M-s and M-r. The observed magnetic traits are deeply discussed in relation with the structure, morphology, magnetic moments and cation distributions.
Description
Keywords
Magnetic nanomaterials, Rare earth substitution, Structure, Optical properties, Magnetic properties, Cation distribution, Antibacterial Biomedical Activity, Magnetic-Properties, Electrical-Properties, Magnetooptical Properties, Coprecipitation Method, Temperature Synthesis, Structural-Properties, Catalytic-Properties, Combustion Synthesis, Optical-Properties
Journal or Series
Ultrasonics Sonochemistry
WoS Q Value
Q1
Scopus Q Value
Q1
Volume
59
