On the preparation, structural and magnetic properties of ZnO:Co nanoparticlesRadhakrishnan Varadhaseshan, Sankarasubramanian Meenakshi Sundar and Chidambaram PremaEur. Phys. J. Appl. Phys., 66 1 (2014) 10602DOI: https://doi.org/10.1051/epjap/2014130316