Date of Award
8-2006
Degree Type
Thesis
Degree Name
M.S.
Degree Program
Applied Physics
Department
Physics
Major Professor
Zhou, Weilie; Stokes, Kevin
Second Advisor
Tang, Jinke
Abstract
Well-aligned DMS Zn1-xMnxO nanowires and nanorods were successfully synthesized in-situ using a chemical vapor deposition method. Low-dimensional nanostructures such as bowls and cages were deposited on a silicon surface downstream of the tube furnace. Variation of reaction temperature and Mn doping level were investigated on structure and properties of the as-grown nanomaterials. The as-grown nanowires and naorods are single crystalline wurtzite structure and possess a growth direction along the c axis. At 850 ºC, the most optimistic condition for ZnO crystal growth was obtained. At high reaction temperature 950ºC, Mn2+ were substitutionally doped into ZnO lattice, resulting in room-temperature ferromagnetic coupling with a saturated magnetization of 0.25emu/g. The ferromagnetic interaction is weakened, however, by larger concentration of Mn, due to the antiferromagnetic coupling of direct superexchange interaction between Mn2+. The well-aligned DMS 1-dimensional Mn doped ZnO nanostructures have great potential for application in spintronic nanodevices.
Recommended Citation
Liu, Jingjing, "Diluted Magnetic Semiconductor Nanomaterials Fabrication by a Chemical Vapor Deposition Method" (2006). University of New Orleans Theses and Dissertations. 426.
https://scholarworks.uno.edu/td/426
Rights
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