History Dependent Phenomena in the Transverse Ising Ferroglass: the Free   Energy Landscape
  In this paper we investigate the relationship between glassy and ferromagnetic phases in disordered Ising ferromagnets in the presence of transverse magnetic fields, $\Gamma$. Iterative mean field simulations probe the free energy landscape and suggest the existence of a glass transition as a function of $\Gamma$ which is distinct from the Curie temperature. New experimental field-cooled and zero-field-cooled data on LiHo$_x$Y$_{1-x}$F$_4$ provide support for our theoretical picture. 
Ying-Jer Kao, G. S. Grest, K. Levin, J. Brooke, T.F. Rosenbaum and G.   Aeppli