Effect of aspect ratio on microstructure and magnetic properties of spinel CoFe2O4 nanowire arrays

Zhangben Wu; Peili Niu; Bai Yang; Ronghai Yu

doi:10.1007/s00339-011-6476-z

Effect of aspect ratio on microstructure and magnetic properties of spinel CoFe₂O₄ nanowire arrays

Zhangben Wu^*
, Peili Niu
, Bai Yang
, Ronghai Yu

^*Corresponding author for this work

School of Materials Science and Engineering

Tsinghua University

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

7 Scopus citations

Abstract

Cobalt ferrite (CoFe₂O₄) nanowire arrays with different diameters were prepared in porous anodic aluminum oxide (AAO) template by a sol-gel template method with the assistance of organic solvent and surfactant. The morphology was studied by scanning electron and transmission electron microscopy. A polycrystalline phase of spinel type structure was ascertained by X-ray diffraction (XRD) patterns. A magnetic test was performed using a physical property measurement system (PPMS), showing the uniaxial anisotropy with easy axis along the nanowire with an aspect ratio larger than 1000. A coercivity reduction from about 1500 Oe to about 800 Oe has been observed, while the diameter increases from 20 nm to 50 nm in this experiment. The cause of this has been discussed.

Original language	English
Pages (from-to)	177-181
Number of pages	5
Journal	Applied Physics A: Materials Science and Processing
Volume	105
Issue number	1
DOIs	https://doi.org/10.1007/s00339-011-6476-z
State	Published - Oct 2011

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abstract = "Cobalt ferrite (CoFe2O4) nanowire arrays with different diameters were prepared in porous anodic aluminum oxide (AAO) template by a sol-gel template method with the assistance of organic solvent and surfactant. The morphology was studied by scanning electron and transmission electron microscopy. A polycrystalline phase of spinel type structure was ascertained by X-ray diffraction (XRD) patterns. A magnetic test was performed using a physical property measurement system (PPMS), showing the uniaxial anisotropy with easy axis along the nanowire with an aspect ratio larger than 1000. A coercivity reduction from about 1500 Oe to about 800 Oe has been observed, while the diameter increases from 20 nm to 50 nm in this experiment. The cause of this has been discussed.",

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doi = "10.1007/s00339-011-6476-z",

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AU - Wu, Zhangben

AU - Niu, Peili

AU - Yang, Bai

AU - Yu, Ronghai

PY - 2011/10

Y1 - 2011/10

N2 - Cobalt ferrite (CoFe2O4) nanowire arrays with different diameters were prepared in porous anodic aluminum oxide (AAO) template by a sol-gel template method with the assistance of organic solvent and surfactant. The morphology was studied by scanning electron and transmission electron microscopy. A polycrystalline phase of spinel type structure was ascertained by X-ray diffraction (XRD) patterns. A magnetic test was performed using a physical property measurement system (PPMS), showing the uniaxial anisotropy with easy axis along the nanowire with an aspect ratio larger than 1000. A coercivity reduction from about 1500 Oe to about 800 Oe has been observed, while the diameter increases from 20 nm to 50 nm in this experiment. The cause of this has been discussed.

AB - Cobalt ferrite (CoFe2O4) nanowire arrays with different diameters were prepared in porous anodic aluminum oxide (AAO) template by a sol-gel template method with the assistance of organic solvent and surfactant. The morphology was studied by scanning electron and transmission electron microscopy. A polycrystalline phase of spinel type structure was ascertained by X-ray diffraction (XRD) patterns. A magnetic test was performed using a physical property measurement system (PPMS), showing the uniaxial anisotropy with easy axis along the nanowire with an aspect ratio larger than 1000. A coercivity reduction from about 1500 Oe to about 800 Oe has been observed, while the diameter increases from 20 nm to 50 nm in this experiment. The cause of this has been discussed.

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SN - 0947-8396

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JO - Applied Physics A: Materials Science and Processing

JF - Applied Physics A: Materials Science and Processing

IS - 1

ER -

Effect of aspect ratio on microstructure and magnetic properties of spinel CoFe₂O₄ nanowire arrays

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