Epitaxial films of Mn-doped ZnO were deposited by pulsed laser deposition on ?-Al2O3(0001) utilizing targets created from Mn-doped ZnO nanoparticles. Using x-ray absorption spectroscopy and x-ray magnetic circular dichroism, Mn(II) was found to substitute for Zn in the würtzite 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 distribution in the ZnO lattice is not stochastic. Rather, Mn has a tendency to segregate upon substitution into regions of higher local concentration.
Revised: August 18, 2014 |
Published: April 13, 2009
Citation
Droubay T.C., D. Keavney, T.C. Kaspar, S.M. Heald, C.M. Wang, C.A. Johnson, and K.M. Whitaker, et al. 2009.Correlated substitution in paramagnetic Mn2+-doped ZnO epitaxial films.Physical Review. B, Condensed Matter and Materials Physics 79, no. 15:Article number:155203.PNNL-SA-62916.