Abstract
We report the synthesis of oriented single crystalline Mn doped ZnO nanowires through a hydrothermal method. Structural characterizations using X-ray diffraction and transmission electron microscopy revealed that the Mn was doped into the lattice structure, forming solid solution. The Mn doped ZnO nanowires possess wurtzite structure with a c-axis growth orientation. The physical properties of the nanowires were investigated. Mn doped ZnO nanowires were found to be ferromagnetic with Curie temperature of about 30 K. A deep level emission band at about 566 nm was observed at room temperature.
Highlights
One-dimensional nanostructures have attracted a great deal of interest because of their basic scientific richness, and of their potential utilization in optical and electronic devices [1,2,3,4,5,6]
We report the synthesis of oriented single crystalline Mn doped ZnO nanowires through a hydrothermal method
Structural characterizations using X-ray diffraction and transmission electron microscopy revealed that the Mn was doped into the lattice structure, forming solid solution
Summary
One-dimensional nanostructures have attracted a great deal of interest because of their basic scientific richness, and of their potential utilization in optical and electronic devices [1,2,3,4,5,6]. Theoretical calculations predict that ZnO should exhibit ferromagnetism above room temperature on doping with Mn [10,11]. This prediction has initiated increasing efforts on Mn doping of ZnO nanostructures. Diluted magnetic semiconductor (DMS) behavior has been observed in many transition-metal doped ZnO films [12,13,14], and Curie temperatures above room temperature were achieved [15,16]. Mn doped ZnO nanowires (or nanobelts) have been obtained by doping Mn into ZnO by using various techniques, such as ion implantation [19], thermal evaporation [20,21,22,23] These methods generally require high temperature and expensive equipments.
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