Effect of Zn Concentration on the Structure, Morphology, and Magnetic Behavior of Ni{sub 1 − x}Zn{sub x}Fe{sub 2}O{sub 4} Ferrofluid

Journal Article · Mon Jul 15 00:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4950-Y· OSTI ID:22921177

Iglesias, S. P.; Arias-Durán, A. ^[1]; Yañez-Limón, J. M.; Ramirez-Bon, R. ^[2]; Hurtado-Macias, A. ^[3]; Arnache, O. ^[4]; Gómez, M. E.; Lopera, W.

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1. Universidad del Valle, Thin Film Group (Colombia)
2. Centro de Investigación y de Estudios Avanzados del IPN-Unidad Querétaro (Mexico)
3. Centro de Investigación en Materiales Avanzados S.C., Laboratorio Nacional de Nanotecnología (Mexico)
4. Universidad de Antioquia, Instituto de Física, Grupo de Estado Sólido (Colombia)

In this work, we investigated the effect of doping zinc ions onto nickel ferrite upon the structure, morphology, and magnetic properties of Ni{sub 1 − x}Zn{sub x}Fe{sub 2}O{sub 4} ferrite nanoparticles (x = 0, 0.25, and 0.75) prepared via co-precipitation method. X-ray diffraction analysis showed the presence of the most intense peak corresponding to the (311) crystallographic orientation of NiFe{sub 2}O{sub 4} cubic spinel phase, and the crystallite size obtained from Scherrer formula increased from 6.8 to 11.2 nm when the Zn concentration increases from x = 0 to x = 0.75. Fourier transform infrared spectroscopy analysis confirmed the presence of a prominent band associated to the vibrations of metal ions, as a feature of spinel ferrite phase formation, observing that their band positions were very sensitive to Zn doping concentration. Transmission electron microscopy studies allowed to determinate that for all Zn concentrations, the particle sizes are around 15 nm. The magnetic properties were studied by using the vibrating sample magnetometer at room temperature. The results reveal superparamagnetic behavior determined by the shape of the hysteresis loop, presenting decreased coercive magnetic field and increased saturation magnetization, with increased zinc concentration. Additionally, from field cooling and zero field cooling curves, we can observe the typical behavior of the blocking process assembly of superparamagnetic nanoparticles. Alternate current susceptibility measurements show that the blocking temperature is frequency dependent and shifts toward higher temperatures by increasing the frequency, a characteristic of superparamagnetic, and glassy systems. Furthermore, τ{sub 0}, related to the jump attempt frequency of the magnetic moment of the nanoparticle between the opposite directions of the magnetization easy axis, is in the range of 2 × 10{sup −10} and 7 × 10{sup −13} s for the three different Zn concentrations, which agrees with characteristic of non-interacting superparamagnetic systems.

• OSTI ID: 22921177
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 32, Issue 7; Other Information: Copyright (c) 2019 Springer Science+Business Media, LLC, part of Springer Nature; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPRECIPITATION
CRYSTALLOGRAPHY
FERRITES
FOURIER TRANSFORM SPECTROMETERS
FREQUENCY DEPENDENCE
HYSTERESIS
MAGNETIC FIELDS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETIZATION
NANOPARTICLES
NICKEL COMPOUNDS
SATURATION
SPINELS
SUPERPARAMAGNETISM
TRANSMISSION ELECTRON MICROSCOPY
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION
ZINC ADDITIONS