History-dependent phenomena in the transverse Ising ferroglass: The free-energy landscape - art. no. 060402

In this paper we investigate the relationship between glassy and ferromagne tic phases in disordered Ising ferromagnets in the presence of transverse m agnetic fields, Gamma. Iterative mean-field simulations probe the free-ener gy landscape and suggest the existence of a glass transition as a function of Gamma which is distinct from the Curie temperature. Experimental field-c ooled and zero-field-cooled data on LiHoxY1-xF4 provide support for our the oretical picture. Here as well we present a collection of theoretical predi ctions for future experiments.