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2008•International Journal of Modern Physics BRequires access

STRUCTURE AND MAGNETIC PROPERTIES OF NANOCRYSTALLINE MnZn FERRITES BY A PHASE TRANSFORMATION METHOD

Yongsheng Liu, Yunbo Zhong, Jincang Zhang, Zhongming Ren, Shixun Cao, Zhenglong Yang, Xiaoming Fu

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Abstract

Nanocrystalline Mn 0.6 Zn 0.4 Fe 2 O 4 particles are synthesized by a phase transformation method. The crystal structure of these particles is that of spinel MnZn ferrite. The average particle size is about 50 nm and the grain size is about 11 nm. Magnetic measurements show that the saturation magnetization at 120 K is ~80% larger than that at 300 K, and imply that the majority of the nanoparticles are superparamagnetic from 65 to 300 K.

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What this paper is about

Nanocrystalline Mn 0.6 Zn 0.4 Fe 2 O 4 particles are synthesized by a phase transformation method. The crystal structure of these particles is that of spinel MnZn ferrite. The average particle size is about 50 nm and the grain size is about 11 nm. Magnetic measurements show that the saturation magnetization at 120 K is ~80% larger than that at 300 K, and imply that the majority of the nanoparticles are superparamagnetic from 65 to 300 K.

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Available abstract

Nanocrystalline Mn 0.6 Zn 0.4 Fe 2 O 4 particles are synthesized by a phase transformation method. The crystal structure of these particles is that of spinel MnZn ferrite. The average particle size is about 50 nm and the grain size is about 11 nm. Magnetic measurements show that the saturation magnetization at 120 K is ~80% larger than that at 300 K, and imply that the majority of the nanoparticles are superparamagnetic from 65 to 300 K.

Key concepts: Nanocrystalline material, Materials science, Superparamagnetism, Spinel, Ferrite (magnet), Grain size, Particle size, Nanoparticle

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