Structural and Magnetic Properties of Mn{sub 1−x}Zn{sub x}Fe{sub 2}O{sub 4} Ferrite Nanoparticles

Journal Article · Tue Nov 15 00:00:00 EST 2016 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-016-3604-1· OSTI ID:22771459

Chandrasekaran, G. ^[1]

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1. Pondicherry University, Department of Physics, School of Physical, Chemical and Applied Sciences (India)

In this work, solid solutions of Mn{sub 1−x}Zn{sub x}Fe{sub 2}O{sub 4} (where x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) ferrite nanoparticles were synthesized using the novel combustion method. A powder X-ray diffraction study confirms the formation of spinel-structured Mn{sub 1−x}Zn{sub x}Fe{sub 2}O{sub 4}. Unusual increases in the lattice constant were observed from 8.358 to 8.435 Å for Zn substitution. Raman spectra show the change in local environment of tetrahedral and octahedral symmetry. Field emission scanning electron microscopy images show that the prepared samples are nanosized and there is not much difference observed in surface morphology. A magnetic study reveals that the prepared samples exhibit superparamagnetic properties with negligible coercivity and the saturation magnetizations initially increase from 31.12 emu g{sup −1} (x = 0) to 35.48 emu g{sup −1} (x = 0.2) and then decrease for further Zn substitution at 300 K. The zero-field-cooled and field-cooled magnetization studies confirm the superparamagnetic nature of prepared samples, and the observed blocking temperature decreases from 146.05 to 32.3 K. At 20 K, the measured hysteresis loop shows the coercivity and it gradually decreases from 810 to 152 Oe. The obtained results suggest that the prepared superparamagnetic Mn{sub 1−x}Zn{sub x}Fe{sub 2}O{sub 4} ferrite nanoparticles are a promising candidate material for biomedical applications.

• OSTI ID: 22771459
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 29, Issue 11; Other Information: Copyright (c) 2016 Springer Science+Business Media New York; 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

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COERCIVE FORCE
COMBUSTION
FERRITES
HYSTERESIS
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MAGNETIZATION
MORPHOLOGY
NANOPARTICLES
NANOSTRUCTURES
RAMAN SPECTRA
SCANNING ELECTRON MICROSCOPY
SOLID SOLUTIONS
SPINELS
SUPERPARAMAGNETISM
X-RAY DIFFRACTION
ZINC