Synthesis of nanocrystalline Ni ferrite as a superparamagnetic material

Nickel ferrite nanoparticles were synthesized by the coprecipitation process. The particle size was in the range 2–13 nm, and with aging time showed superparamagnetism for the sample designated NF0 and paramagnetism and ferrimagnetism for samples NF3, NF6, NF9, and NF12. The NF0 nanoparticles with a...

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Bibliographic Details
Published in:Physica status solidi. A, Applied research Applied research, 2004-06, Vol.201 (8), p.1838-1841
Main Authors: Nam, Joong-Hee, Kim, Won Ki, Park, Sang Jin
Format: Article
Language:English
Subjects:
75.60.−d
75.75.+a
81.07.Bc
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Diamagnetism, paramagnetism and superparamagnetism
Exact sciences and technology
Magnetic properties and materials
Materials science
Nanoscale materials and structures: fabrication and characterization
Other topics in nanoscale materials and structures
Physics
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Summary:Nickel ferrite nanoparticles were synthesized by the coprecipitation process. The particle size was in the range 2–13 nm, and with aging time showed superparamagnetism for the sample designated NF0 and paramagnetism and ferrimagnetism for samples NF3, NF6, NF9, and NF12. The NF0 nanoparticles with a spherical shape exhibited superparamagnetic behavior at room temperature with TB = 60 K. The samples NF3 and NF9 after aging treatment displayed superparamagnetic and ferrimagnetic properties with TB = 160 K, which means the superparamagnetic phase decreased with increasing particle size. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:0031-8965
1521-396X
DOI:10.1002/pssa.200304638