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Preparation of Cu-doped γ-Fe2O3 nanowires with high coercivity by chemical vapor deposition

Published online by Cambridge University Press:  28 June 2011

Shao-Min Zhou ,
Shi-Yun Lou ,
Yong-Qiang Wang ,
Xi-Liang Chen ,
Li-Sheng Liu  and
Hong-Lei Yuan
Shao-Min Zhou*
Affiliation:
Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, People’s Republic of China
Shi-Yun Lou
Affiliation:
Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, People’s Republic of China
Yong-Qiang Wang
Affiliation:
Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, People’s Republic of China
Xi-Liang Chen
Affiliation:
Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, People’s Republic of China
Li-Sheng Liu
Affiliation:
Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, People’s Republic of China
Hong-Lei Yuan
Affiliation:
Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Iron oxides, including maghemite (γ-Fe2O3) and magnetite (Fe3O4), have been widely applied in many fields. For technological advances in the future, further improvements of their ferromagnetic properties are desirable. The development of iron ferrites with a large coercive field (Hc) is one of issues of consequence. For ferrites, however, enlarging the Hc value is not easy because of their low magnetocrystalling anisotropy constant. Here we report single-crystalline Cu-doped γ-Fe2O3 nanowires in which the controlled diameter (70–100 nm) and the graded Cu dopant (7, 10, and 15%) are directly obtained by a simple chemical vapor deposition technique. In particular, the coercive value (over 2 T) of 10% Cu-doped γ-Fe2O3 nanowires is much higher than that (<80 Oe) of undoped γ-Fe2O3 nanowires at room temperature. On the basis of the experimental magnetization data, the achievement of such a higher coercive field of Cu-doped γ-Fe2O3 (10%) nanowires is tentatively suggested.

Keywords

NanostructureMagnetic propertiesChemical vapor deposition
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 13 , 14 July 2011 , pp. 1634 - 1638
Copyright
Copyright © Materials Research Society 2011

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