Correlated substitution in paramagnetic Mn{sup 2+}-doped ZnO epitaxial films.
Epitaxial films of Mn2+-doped ZnO were deposited by pulsed laser deposition on {alpha}-Al{sub 2}O{sub 3}(0001) using targets created from Mn{sup 2+}-doped ZnO nanoparticles. Using x-ray absorption spectroscopy and x-ray magnetic circular dichroism, Mn(II) was found to substitute for Zn(II) in the wuertzite ZnO lattice with only a paramagnetic dichroic component from the Mn and no magnetic component from either the O or Zn. The dichroism reveals that, while substitutional, the Mn{sup 2+} distribution in the ZnO lattice is not stochastic. Rather, Mn{sup 2+} has a tendency to substitute with higher effective local concentrations than anticipated from a stochastic doping model.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); Sloan Foundation; Dreyfus Foundatioon and Research Corp.
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 957395
- Report Number(s):
- ANL/XSD/JA-63487; TRN: US201002%%963
- Journal Information:
- Phys. Rev. B, Vol. 79, Issue Apr. 2009; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- ENGLISH
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