Visual evidence of the magnetic glass state and its re-crystallization in Gd5Ge4 M. K. Chattopadhyay, S. B. Roy, K. Morrison, J. D. Moore, G. K. Perkins, L. F. Cohen, K. A. Gschneidner jr. and V. K. Pecharsky EPL, 83 5 (2008) 57006 Published online: 03 September 2008 DOI: 10.1209/0295-5075/83/57006