EPR spectroscopy of weak exchange interactions between Co2+ ions in ZnO (pages 138–140)
D. V. Azamat, A. Dejneka, V. A. Trepakov, L. Jastrabik, M. Fanciulli, V. Y. Ivanov, M. Godlewski, V. I. Sokolov, J. Rosa and A. G. Badalyan
Article first published online: 18 FEB 2011 | DOI: 10.1002/pssr.201105014
Electron Paramagnetic Resonance (EPR) measurements have unambiguously shown the presence of exchanged-coupled Co2+ pairs in the heavily doped ZnO single crystals. This Letter reports on the first determination of the exchange tensor components of Co2+ dimers that are incorporated into the ZnO lattice in a highly selective way. The detailed EPR spectra are due to weakly ferromagnetically coupled next-nearest-neighbour Co2+ ions.