Preparation and magnetic property analysis of monodisperse Co–Zn ferrite nanospheres

Comparison study on magnetic property of Co0.5Zn0.5Fe2O4 powders by template-assisted sol–gel and hydrothermal methods

“…The magnetization of the Co 0.5 Zn 0.5 Fe 2 O 4 nanoparticles increased with increasing applied field, but it did not reach the saturation state even under high magnetic fields of 30 KOe, especially for the powders synthesized by the hydrothermal method. This characteristic was also reported for the Co 0.5 Zn 0.5 Fe 2 O 4 nanospheres synthesized by a solvothermal method [9]. This nanospheres had the diameter about 100-200 nm, and were constructed with tiny nanocrystallites with an average diameter of 10-15 nm that was closed to the particle size of the powder hydrothermally synthesized in this work.…”

Magnetic Properties of Co0.5Zn0.5Fe2O4Nanoparticles Synthesized by a Template-Assisted Hydrothermal Method

“…This characteristic was also reported for the Co 0.5 Zn 0.5 Fe 2 O 4 nanospheres prepared via the solvothermal method, and the saturation magnetization of the nanoparticles was close to that observed for the nanospheres at an applied field of 5 kOe (64.6 emu·g −1 ) [18]. The saturation magnetization of these samples was smaller than that observed for the bulk material though (∼80 emu·g −1 ) [12,14].…”

ZnFe2O4 Containing Nanoparticles: Synthesis and Magnetic Properties

“…Ferrites with nanocrystalline structure are technologically important materials because of their unique electric, dielectric, electronic, mechanic, magnetic, optical and catalytic properties. Mixed Me-Zn ferrites are characterized by good magnetic properties [1], low (for NiFe2O4) [2] or high (for CoFe2O4) [3] magnetic coercivity, high electrical resistivity and negligible eddy current loss for high-frequency electromagnetic wave propagation [2], chemical stability and fairly high mechanical hardness [4], low dielectric losses and high Curie temperature [5]. CoFe2O4 has high permeability in the radio frequency range [6], high thermal stability [7], moderate saturation magnetization [8] and electrical conductivity [9].…”

“…Mixed Me-Zn ferrites are characterized by good magnetic properties [1], low (for NiFe2O4) [2] or high (for CoFe2O4) [3] magnetic coercivity, high electrical resistivity and negligible eddy current loss for high-frequency electromagnetic wave propagation [2], chemical stability and fairly high mechanical hardness [4], low dielectric losses and high Curie temperature [5]. CoFe2O4 has high permeability in the radio frequency range [6], high thermal stability [7], moderate saturation magnetization [8] and electrical conductivity [9]. It makes them suitable for many technological applications -like microwave devices [10] and telecommunication applications, electric motors and generators, excellent core material for power transformers in electronics, antenna rods, loading coils and read/write heads for high speed digital tape [1], recording tapes and discs [8], high-density information storage and recording devices and as permanent magnets [10], sensors [11] etc.…”

“…CoFe2O4 has high permeability in the radio frequency range [6], high thermal stability [7], moderate saturation magnetization [8] and electrical conductivity [9]. It makes them suitable for many technological applications -like microwave devices [10] and telecommunication applications, electric motors and generators, excellent core material for power transformers in electronics, antenna rods, loading coils and read/write heads for high speed digital tape [1], recording tapes and discs [8], high-density information storage and recording devices and as permanent magnets [10], sensors [11] etc. Magnetic nanoparticles and, in particular, magnetic fluids (ferrofluids) have been important for applications in biotechnology and biomedicine -biomedical drug delivery and as contrast agents [11], medical diagnostics [12].…”