Understanding the formation of ultrafine spinel CoFe2O4 nanoplatelets and their magnetic properties

Wenchao Liu; Yukkwan Chan; Jinzhu Cai; Chi Wah Leung; Chee Leung Mak; Kinhung Wong; Fengming Zhang; Xiaoshan Wu; X. D. Qi

doi:10.1063/1.4765033

Understanding the formation of ultrafine spinel CoFe2O4 nanoplatelets and their magnetic properties

Wenchao Liu, Yukkwan Chan, Jinzhu Cai, Chi Wah Leung, Chee Leung Mak, Kinhung Wong, Fengming Zhang, Xiaoshan Wu, X. D. Qi

Research output: Journal article publication › Journal article › Academic research › peer-review

44 Citations (Scopus)

Abstract

Cobalt ferrite (CoFe2O4, CFO) nanoplatelets with a rhomboidal shape were synthesized through a facile hydrothermal route using a very low concentration precursor at low temperatures. The effects of reaction temperature and time on the morphologies as well as the sizes of the products were systemically investigated. The as-synthesized CFO nanocrystals showed a special rhomboidal shape with crystal growth along the (111) direction. The very low concentration precursor plays an important role in forming CFO nanocrystals with such special shape and ultrafine size. The single-phase CFO nanoplatelets synthesized at 180°C with size of 17 nm present high saturation magnetization (79.7 emu/g) and high coercivity (3100 Oe). The preparation conditions have significant effects on the crystal size and shape, magnetization and relaxation activation of the CFO nanoplatelets.

Original language	English
Article number	104306
Journal	Journal of Applied Physics
Volume	112
Issue number	10
DOIs	https://doi.org/10.1063/1.4765033
Publication status	Published - 15 Nov 2012

ASJC Scopus subject areas

General Physics and Astronomy

More information

10.1063/1.4765033

http://hdl.handle.net/10397/5892

Cite this

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abstract = "Cobalt ferrite (CoFe2O4, CFO) nanoplatelets with a rhomboidal shape were synthesized through a facile hydrothermal route using a very low concentration precursor at low temperatures. The effects of reaction temperature and time on the morphologies as well as the sizes of the products were systemically investigated. The as-synthesized CFO nanocrystals showed a special rhomboidal shape with crystal growth along the (111) direction. The very low concentration precursor plays an important role in forming CFO nanocrystals with such special shape and ultrafine size. The single-phase CFO nanoplatelets synthesized at 180°C with size of 17 nm present high saturation magnetization (79.7 emu/g) and high coercivity (3100 Oe). The preparation conditions have significant effects on the crystal size and shape, magnetization and relaxation activation of the CFO nanoplatelets.",

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AU - Liu, Wenchao

AU - Chan, Yukkwan

AU - Cai, Jinzhu

AU - Leung, Chi Wah

AU - Mak, Chee Leung

AU - Wong, Kinhung

AU - Zhang, Fengming

AU - Wu, Xiaoshan

AU - Qi, X. D.

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AB - Cobalt ferrite (CoFe2O4, CFO) nanoplatelets with a rhomboidal shape were synthesized through a facile hydrothermal route using a very low concentration precursor at low temperatures. The effects of reaction temperature and time on the morphologies as well as the sizes of the products were systemically investigated. The as-synthesized CFO nanocrystals showed a special rhomboidal shape with crystal growth along the (111) direction. The very low concentration precursor plays an important role in forming CFO nanocrystals with such special shape and ultrafine size. The single-phase CFO nanoplatelets synthesized at 180°C with size of 17 nm present high saturation magnetization (79.7 emu/g) and high coercivity (3100 Oe). The preparation conditions have significant effects on the crystal size and shape, magnetization and relaxation activation of the CFO nanoplatelets.

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Understanding the formation of ultrafine spinel CoFe2O4 nanoplatelets and their magnetic properties

Abstract

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