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Open Access Nano Express

Magnetic Properties of Ni-doped ZnO Nanocombs by CVD Approach

Zhou ShaoMin*, Yuan HongLei, Liu LiSheng, Chen XiLiang, Lou ShiYun, Hao YaoMing, Yuan RuiJian and Li Ning

Author Affiliations

Key Lab for Special Functional Materials of Ministry of Education, Henan University, 475004, Kaifeng, People’s Republic of China

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Nanoscale Research Letters 2010, 5:1284-1288  doi:10.1007/s11671-010-9639-5

Published: 18 May 2010

Abstract

The search for above room temperature ferromagnetism in dilute magnetic semiconductors has been intense in recent year. Arrays of perpendicular ferromagnetic nanowire/rods have recently attracted considerable interest for their potential use in many areas of advanced nanotechnology. We report a simple low-temperature chemical vapor deposition (CVD) to create self-assembled comb-like Ni-/undoped ZnO nanostructure arrays. The phases, compositions, and physical properties of the studied samples were analyzed by different techniques, including high-resolution X-ray diffraction/photoelectron spectroscopy/transmission electron microscopy, photoluminescence, and MPMS. In particular, the Ni-doped ZnO nanocombs (NCs) with ferromagnetic and superparamagnetic properties have been observed whereas undoped ZnO NCs disappear. The corresponding ferromagnetic source mechanism is discussed, in which defects such as O vacancies would play an important role.

Keywords:
Magnetism; II–VI semiconductors; Nanostructures; Zinc oxide