Ferromagnetic spin ordering in amorphous Co-doped InGaZnO based on the Co–H–Co complex Seunghun Lee, Won-Kyung Kim, Yong Chan Cho, Seung-Wan Seo, Jong-Seong Bae, Chae Ryong Cho, Hideomi Koinuma and Se-Young Jeong EPL, 98 1 (2012) 17008 Published online: 05 April 2012 DOI: 10.1209/0295-5075/98/17008