Ultrafast optical detection of magnetic inhomogeneity in ferromagnetic La0.67Ca0.33MnO3 Y. Gong, Z. Zhang, D. Ascienzo, Y. Abranyos, H. B. Zhao, G. Lüpke, Qi Li and Y. H. Ren EPL, 108 1 (2014) 17010 Published online: 08 October 2014 DOI: 10.1209/0295-5075/108/17010