Effects of cation disorder on terahertz emission from half-doped manganite thin films K. R. Mavani, D. S. Rana, K. Takahashi, I. Kawayama, H. Murakami and M. Tonouchi EPL, 81 1 (2008) 17009 Published online: 06 December 2007 DOI: 10.1209/0295-5075/81/17009