Magnetic Properties of Fe-Implanted ZnO Nanotips Grown by Metal-Organic Chemical Vapor Deposition
Fe ions were implanted into well-aligned single-crystal ZnO nanotips grown on SiO{sub 2}/quartz substrates using metal-organic chemical vapor deposition (MOCVD). The Fe ion concentration distribution within a single nanotip is mapped by electron energy loss spectroscopy (EELS) and energy dispersive spectroscopy (EDS) and the nanotips imaged by high-resolution transmission electron microscopy (TEM). X-ray absorption spectroscopy (XAS) identified the presence of Fe{sup 2+} and Fe{sup 3+} ions in both as-implanted and annealed samples. However, Fe{sup 3+} ion concentration increased during postannealing. Superconducting quantum interference device (SQUID) measurements show that the as-implanted and postannealed ZnO nanotips are ferromagnetic at room temperature. The observed ferromagnetism in the as-implanted nanotips is primarily attributed to the near surface 10-nm region that has high Fe concentration. The saturation magnetization reduces after annealing.
- Research Organization:
- Brookhaven National Laboratory (BNL) National Synchrotron Light Source
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 929932
- Report Number(s):
- BNL--80526-2008-JA
- Journal Information:
- Journal of Electronic Materials, Journal Name: Journal of Electronic Materials Journal Issue: 4 Vol. 36; ISSN JECMA5; ISSN 0361-5235
- Country of Publication:
- United States
- Language:
- English
Similar Records
The effect of flash lamp annealing on Fe implanted ZnO single crystals
Room Temperature Ferromagnetism of FeCo-Codoped ZnO Nanorods Prepared by Chemical Vapor Deposition
Related Subjects
ABSORPTION SPECTROSCOPY
ANNEALING
CHEMICAL VAPOR DEPOSITION
ELECTRONS
ENERGY
ENERGY-LOSS SPECTROSCOPY
FERROMAGNETISM
IONS
MAGNETIC PROPERTIES
MAGNETIZATION
QUARTZ
SATURATION
SPECTROSCOPY
SQUID DEVICES
SUBSTRATES
SURFACES
TRANSMISSION ELECTRON MICROSCOPY
national synchrotron light source