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

Wenchao Liu | Zendy; Yukkwan Chan | Zendy; Jinzhu Cai | Zendy; Chi Wah Leung | Zendy; Chee Leung Mak | Zendy; KinHung Wong | Zendy; Fengming Zhang | Zendy; Xiaoshan Wu | Zendy; Xiaoding Qi | Zendy

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

Author(s) -

Wenchao Liu,

Yukkwan Chan,

Jinzhu Cai,

Chi Wah Leung,

Chee Leung Mak,

KinHung Wong,

Fengming Zhang,

Xiaoshan Wu,

Xiaoding Qi

Publication year - 2012

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.4765033

Subject(s) - coercivity , materials science , spinel , nanocrystal , cobalt , magnetization , hydrothermal circulation , cobalt ferrite , chemical engineering , ferrite (magnet) , nanoparticle , phase (matter) , nanotechnology , metallurgy , composite material , condensed matter physics , chemistry , magnetic field , engineering , physics , organic chemistry , quantum mechanics

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.Department of Applied PhysicsMaterials Research CentreAuthor name used in this publication: Leung, Chiwah.Author name used in this publication: Chan YukkwanAuthor name used in this publication: Mak, CheeleungAuthor name used in this publication: Wong, Kinhun

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