Synthesis of size-controlled cobalt ferrite particles with high coercivity and squareness ratio

C. N. Chinnasamy; M. Senoue; B. Jeyadevan; Oscar Perales-Perez; Kozo Shinoda; Kazuyuki Tohji

doi:10.1016/S0021-9797(03)00258-3

Synthesis of size-controlled cobalt ferrite particles with high coercivity and squareness ratio

C. N. Chinnasamy, M. Senoue, B. Jeyadevan, Oscar Perales-Perez, Kozo Shinoda, Kazuyuki Tohji

Research output: Contribution to journal › Article › peer-review

134 Citations (Scopus)

Abstract

Cobalt ferrite particles with diameters ranging from a few micrometer to about 15 nm were synthesized using a modified oxidation process. The fine control of the particle size was achieved by introducing various concentrations of Fe³⁺ ions at the beginning of the reaction. Among the particle sizes obtained by using this method, particles with a grain size of about 36 nm showed a magnetization (M_s) of 64 emu/g and a maximum coercivity (H_c) of 2020 Oe at room temperature. The corresponding squareness ratio was found to be 0.53.

Original language	English
Pages (from-to)	80-83
Number of pages	4
Journal	Journal of Colloid And Interface Science
Volume	263
Issue number	1
DOIs	https://doi.org/10.1016/S0021-9797(03)00258-3
Publication status	Published - 2003 Jul 1

Keywords

Cobalt ferrite
Colloids
Coprecipitation
Ferrous oxidation by nitrate
Magnetic characterization
Nanoparticles

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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10.1016/S0021-9797(03)00258-3

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abstract = "Cobalt ferrite particles with diameters ranging from a few micrometer to about 15 nm were synthesized using a modified oxidation process. The fine control of the particle size was achieved by introducing various concentrations of Fe3+ ions at the beginning of the reaction. Among the particle sizes obtained by using this method, particles with a grain size of about 36 nm showed a magnetization (Ms) of 64 emu/g and a maximum coercivity (Hc) of 2020 Oe at room temperature. The corresponding squareness ratio was found to be 0.53.",

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T1 - Synthesis of size-controlled cobalt ferrite particles with high coercivity and squareness ratio

AU - Chinnasamy, C. N.

AU - Senoue, M.

AU - Jeyadevan, B.

AU - Perales-Perez, Oscar

AU - Shinoda, Kozo

AU - Tohji, Kazuyuki

PY - 2003/7/1

Y1 - 2003/7/1

N2 - Cobalt ferrite particles with diameters ranging from a few micrometer to about 15 nm were synthesized using a modified oxidation process. The fine control of the particle size was achieved by introducing various concentrations of Fe3+ ions at the beginning of the reaction. Among the particle sizes obtained by using this method, particles with a grain size of about 36 nm showed a magnetization (Ms) of 64 emu/g and a maximum coercivity (Hc) of 2020 Oe at room temperature. The corresponding squareness ratio was found to be 0.53.

AB - Cobalt ferrite particles with diameters ranging from a few micrometer to about 15 nm were synthesized using a modified oxidation process. The fine control of the particle size was achieved by introducing various concentrations of Fe3+ ions at the beginning of the reaction. Among the particle sizes obtained by using this method, particles with a grain size of about 36 nm showed a magnetization (Ms) of 64 emu/g and a maximum coercivity (Hc) of 2020 Oe at room temperature. The corresponding squareness ratio was found to be 0.53.

KW - Cobalt ferrite

KW - Colloids

KW - Coprecipitation

KW - Ferrous oxidation by nitrate

KW - Magnetic characterization

KW - Nanoparticles

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Synthesis of size-controlled cobalt ferrite particles with high coercivity and squareness ratio

Abstract

Keywords

ASJC Scopus subject areas

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