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2015•Advances in engineering research/Advances in Engineering ResearchOpen access

Synthesis and magnetic properties of Mn1-xCoxFe2O4 nanoparticles

Qingwei Qiu, Xiaowen Xu

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Abstract

Chemically mixed Mn 1-x Co x Fe 2 O 4 nanoparticles with the size about 8 nm were synthesized by thermal decomposition method.The content of Co element x varied from 0.02 to 0.08.Magnetic measurement indicated that 8 nm Mn 1-x Co x Fe 2 O 4 nanoparticles were superparamagnetic at room temperature and ferromagnetic at the temperature of 5 K.Both the blocking temperature and coercivity of Mn 1-x Co x Fe 2 O 4 nanoparticles increased with increasing Co addition.Mn 1-x Co x Fe 2 O 4 nanoparticles showed not only high saturated magnetization but also large coercivity at low temperature, which have great potential in magnetic nanodevice and biomagnetic applications.

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Chemically mixed Mn 1-x Co x Fe 2 O 4 nanoparticles with the size about 8 nm were synthesized by thermal decomposition method.The content of Co element x varied from 0.02 to 0.08.Magnetic measurement indicated that 8 nm Mn 1-x Co x Fe 2 O 4 nanoparticles were superparamagnetic at room temperature and ferromagnetic at the temperature of 5 K.Both the blocking temperature and coercivity of Mn 1-x Co x Fe 2 O 4 nanoparticles increased with increasing Co addition.Mn 1-x Co x Fe 2 O 4 nanoparticles showed not only high saturated magnetization but also large coercivity at low temperature, which have great potential in magnetic nanodevice and biomagnetic applications.

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Available abstract

Chemically mixed Mn 1-x Co x Fe 2 O 4 nanoparticles with the size about 8 nm were synthesized by thermal decomposition method.The content of Co element x varied from 0.02 to 0.08.Magnetic measurement indicated that 8 nm Mn 1-x Co x Fe 2 O 4 nanoparticles were superparamagnetic at room temperature and ferromagnetic at the temperature of 5 K.Both the blocking temperature and coercivity of Mn 1-x Co x Fe 2 O 4 nanoparticles increased with increasing Co addition.Mn 1-x Co x Fe 2 O 4 nanoparticles showed not only high saturated magnetization but also large coercivity at low temperature, which have great potential in magnetic nanodevice and biomagnetic applications.

Key concepts: Coercivity, Superparamagnetism, Nanoparticle, Materials science, Thermal decomposition, Ferromagnetism, Magnetic nanoparticles, Magnetization

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