Structural and Soft Magnetic Properties of Nickel-Substituted Co-Zn Nanoferrites

Journal Article · Mon Oct 15 00:00:00 EDT 2018 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4569-Z· OSTI ID:22773742

Srinivas, Adiraj ^[1]

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1. DRDO, Defence Metallurgical Research Laboratory (India)

Nickel-substituted cobalt-zinc nanoferrites (Co{sub 0.5−x}Zn{sub 0.5}Ni{sub x}Fe{sub 2}O{sub 4}, x = 0.05 to 0.25 in steps of 0.05) were synthesized in a citric acid auto-combustion method. Divalent strong paramagnetic nickel ions substituted in place of ferromagnetic cobalt ions resulted in slight modifications over structural and significant changes in magnetic properties of the system. All samples were characterized with X-ray diffraction technique for structure determination. Crystallite sizes were calculated using the Williamson-Hall plot and size-strain plots, from these lattice strain and microstrain were discussed. Transmission electron microscopy measurements were done for the base sample (x = 0), and they showed well-developed spherical particles with an average size of 35 nm. SEM micrograph was recorded for the base sample to observe surface morphology, and it was observed to be stoichiometric, as evident from EDAX measurements. Saturation magnetization, remanence, coercivity and remanence ratio were measured using M-H loops recorded using a vibrating sample magnetometer at room temperature. Magnetocrystalline anisotropy was discussed with the help of magnetocrystalline anisotropy constant (K{sub 1}) obtained from the law of approach to saturation method.

• OSTI ID: 22773742
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 31, Issue 10; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
CITRIC ACID
COBALT IONS
COERCIVE FORCE
FERRITES
MAGNETIC PROPERTIES
MAGNETIZATION
MORPHOLOGY
NICKEL
PARAMAGNETISM
PARTICLES
SCANNING ELECTRON MICROSCOPY
SPHERICAL CONFIGURATION
STOICHIOMETRY
SURFACES
TRANSMISSION ELECTRON MICROSCOPY
VIBRATING SAMPLE MAGNETOMETERS
X-RAY DIFFRACTION
ZINC