Magnetic and transport properties of transition-metal implanted ZnO single crystalsR. P. Borges, B. Ribeiro, A. R.G. Costa, C. Silva, R. C. da Silva, G. Evans, A. P. Gonçalves, M. M. Cruz and M. GodinhoEur. Phys. J. B, 79 2 (2011) 185-195DOI: https://doi.org/10.1140/epjb/e2010-10512-3