Related Experiment Video
Updated: May 20, 2025
An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature
Published on: September 23, 2018
Optimized Zn substituted CoFe2O4 nanoparticles for high efficiency magnetic hyperthermia in biomedical applications
Ali Aftabi1,2, Asra Babakhani3, Rohollah Khoshlahni4
1Department of Physics, Faculty of Science, University of Kurdistan, Sanandaj, 66177-15175, Iran. a.aftabi@uok.ac.ir.
Abstract:
This study presents a systematic study on the structural, magnetic, and hyperthermia properties of Zn-substituted cobalt ferrite (ZnxCo1-xFe2O4, x = 0.0-0.7) nanoparticles synthesized via the hydrothermal method. X-ray diffraction patterns confirmed a pure spinel structure, with Rietveld refinement revealing cation redistribution and lattice distortions. Magnetic measurements showed a transition from ferrimagnetic (x ≤ 0.2) to superparamagnetic behavior (x ≥ 0.5), accompanied by a peak in saturation magnetization at x = 0.2 and a continuous decrease in coercivity. These changes were attributed to Zn-induced modulation of cation distribution and superexchange interactions. Magnetic hyperthermia studies demonstrated that Zn0.6Co0.4Fe2O4 exhibited the highest specific loss power (SLP) and intrinsic loss power (ILP) under alternating magnetic fields (65-125 Oe) and frequencies (250-350 kHz). The observed quadratic dependence of SLP on field amplitude confirmed adherence to linear response theory, with experimental conditions remaining within clinical safety limits. These findings highlight Zn0.6Co0.4Fe2O4 as an efficient candidate for magnetic hyperthermia applications, demonstrating tunable structural and magnetic properties for biomedical use.
More Related Videos
08:14Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO
Published on: July 31, 2016
09:41Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
Published on: May 29, 2018
Related Concept Videos
03:02Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
02:42Valence Bond Theory
02:54Trends in Lattice Energy: Ion Size and Charge
02:58Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
02:42Ionic Crystal Structures
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
01:31Ferromagnetism